diff -Naurp httpd-2.4.x.orig/docs/manual/mod/mod_proxy.xml httpd-2.4.x.new/docs/manual/mod/mod_proxy.xml
--- httpd-2.4.x.orig/docs/manual/mod/mod_proxy.xml	2014-11-03 14:51:41.961619210 +0100
+++ httpd-2.4.x.new/docs/manual/mod/mod_proxy.xml	2014-11-03 15:52:33.083979540 +0100
@@ -1517,6 +1517,41 @@ will rewrite a cookie with backend path
 </directivesynopsis>
 
 <directivesynopsis>
+<name>ProxyPassReverseCookiePathMatch</name>
+<description>Adjusts the Path string in Set-Cookie headers from a reverse-
+proxied server using a regular expression</description>
+<syntax>ProxyPassReverseCookiePathMatch <var>regex</var>
+<var>public-path</var> [<var>interpolate</var>]</syntax>
+<contextlist><context>server config</context><context>virtual host</context>
+<context>directory</context>
+</contextlist>
+<usage>
+<p>
+This directive is equivalent to 
+<directive module="mod_proxy">ProxyPassReverseCookiePath</directive>,
+but makes use of <glossary ref="regex">regular expressions</glossary>
+instead of simple prefix matching. In addition, <var>public-path</var> is
+subject to parenthesized matches substitution, thus allowing a dynamic path
+mapping.
+</p>
+<p>
+As a special case, if <var>public-path</var> is set to <code>!</code>, the
+cookie path is left unchanged: this can be used to disable matching by the
+subsequent <directive module="mod_proxy">ProxyPassReverseCookie</directive>/
+<directive module="mod_proxy">ProxyPassReverseCookiePath</directive> directives.
+</p>
+<p>
+In example, the following statement maps the path prefix (where
+<directive module="mod_proxy">ProxyPassReverseCookie</directive> would have
+replaced the full path), keeping the path trailer:
+</p>
+    <highlight language="config">
+      ProxyPassReverseCookiePathMatch  ^/(.*)$  /foo/$1
+    </highlight>
+</usage>
+</directivesynopsis>
+
+<directivesynopsis>
 <name>ProxyBlock</name>
 <description>Words, hosts, or domains that are banned from being
 proxied</description>
@@ -1879,15 +1914,17 @@ header for proxied requests</description
 <usage>
     <p>This directive, together with the <var>interpolate</var> argument to
     <directive>ProxyPass</directive>, <directive>ProxyPassReverse</directive>,
-    <directive>ProxyPassReverseCookieDomain</directive> and
-    <directive>ProxyPassReverseCookiePath</directive>
+    <directive>ProxyPassReverseCookieDomain</directive>,
+    <directive>ProxyPassReverseCookiePath</directive> and
+    <directive>ProxyPassReverseCookiePathMatch</directive>
     enables reverse proxies to be dynamically
     configured using environment variables, which may be set by
     another module such as <module>mod_rewrite</module>.
     It affects the <directive>ProxyPass</directive>,
     <directive>ProxyPassReverse</directive>,
-    <directive>ProxyPassReverseCookieDomain</directive>, and
-    <directive>ProxyPassReverseCookiePath</directive> directives,
+    <directive>ProxyPassReverseCookieDomain</directive>,
+    <directive>ProxyPassReverseCookiePath</directive> and
+    <directive>ProxyPassReverseCookiePathMatch</directive> directives,
     and causes them to substitute the value of an environment
     variable <code>varname</code> for the string <code>${varname}</code>
     in configuration directives (if the <var>interpolate</var> option is set).</p>
diff -Naurp httpd-2.4.x.orig/docs/manual/urlmapping.xml httpd-2.4.x.new/docs/manual/urlmapping.xml
--- httpd-2.4.x.orig/docs/manual/urlmapping.xml	2014-11-03 14:51:43.115629305 +0100
+++ httpd-2.4.x.new/docs/manual/urlmapping.xml	2014-11-03 14:58:25.791134780 +0100
@@ -58,6 +58,7 @@
 <directive module="mod_proxy">ProxyPassReverse</directive>
 <directive module="mod_proxy">ProxyPassReverseCookieDomain</directive>
 <directive module="mod_proxy">ProxyPassReverseCookiePath</directive>
+<directive module="mod_proxy">ProxyPassReverseCookiePathMatch</directive>
 <directive module="mod_alias">Redirect</directive>
 <directive module="mod_alias">RedirectMatch</directive>
 <directive module="mod_rewrite">RewriteCond</directive>
@@ -279,8 +280,9 @@ the server to fetch the appropriate docu
 directive rewrites redirects originating at
 <code>internal.example.com</code> so that they target the appropriate
 directory on the local server.  Similarly, the
-<directive module="mod_proxy">ProxyPassReverseCookieDomain</directive>
-and <directive module="mod_proxy">ProxyPassReverseCookiePath</directive>
+<directive module="mod_proxy">ProxyPassReverseCookieDomain</directive>,
+<directive module="mod_proxy">ProxyPassReverseCookiePath</directive>
+and <directive module="mod_proxy">ProxyPassReverseCookiePathMatch</directive>
 rewrite cookies set by the backend server.</p>
 <p>It is important to note, however, that
 links inside the documents will not be rewritten. So any absolute
diff -Naurp httpd-2.4.x.orig/modules/proxy/mod_proxy.c httpd-2.4.x.new/modules/proxy/mod_proxy.c
--- httpd-2.4.x.orig/modules/proxy/mod_proxy.c	2014-11-03 14:51:46.213656406 +0100
+++ httpd-2.4.x.new/modules/proxy/mod_proxy.c	2014-11-03 14:52:54.436253123 +0100
@@ -1723,10 +1723,26 @@ static const char* cookie_path(cmd_parms
     new = apr_array_push(conf->cookie_paths);
     new->fake = f;
     new->real = r;
+    new->regex = NULL;
     new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
 
     return NULL;
 }
+static const char* cookie_path_regex(cmd_parms *cmd, void *dconf, const char *f,
+                                     const char *r, const char *interp)
+{
+    proxy_dir_conf *conf = dconf;
+    struct proxy_alias *new;
+
+    new = apr_array_push(conf->cookie_paths);
+    new->fake = f;
+    new->real = r;
+    new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
+    new->regex = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
+    if (new->regex == NULL)
+        return "Regular expression could not be compiled.";
+    return NULL;
+}
 static const char* cookie_domain(cmd_parms *cmd, void *dconf, const char *f,
                                  const char *r, const char *interp)
 {
@@ -2401,6 +2417,8 @@ static const command_rec proxy_cmds[] =
      "a virtual path and a URL for reverse proxy behaviour"),
     AP_INIT_TAKE23("ProxyPassReverseCookiePath", cookie_path, NULL,
        RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"),
+    AP_INIT_TAKE23("ProxyPassReverseCookiePathMatch", cookie_path_regex, NULL,
+       RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"),
     AP_INIT_TAKE23("ProxyPassReverseCookieDomain", cookie_domain, NULL,
        RSRC_CONF|ACCESS_CONF, "Domain rewrite rule for proxying cookies"),
     AP_INIT_ITERATE("ProxyBlock", set_proxy_exclude, NULL, RSRC_CONF,
diff -Naurp httpd-2.4.x.orig/modules/proxy/proxy_util.c httpd-2.4.x.new/modules/proxy/proxy_util.c
--- httpd-2.4.x.orig/modules/proxy/proxy_util.c	2014-11-03 14:51:46.371657788 +0100
+++ httpd-2.4.x.new/modules/proxy/proxy_util.c	2014-11-03 14:52:54.437253147 +0100
@@ -971,6 +971,7 @@ PROXY_DECLARE(const char *) ap_proxy_coo
     const char *pathe = NULL;
     const char *domaine = NULL;
     apr_size_t l1, l2, poffs = 0, doffs = 0;
+    ap_regmatch_t regm[AP_MAX_REG_MATCH];
     int i;
     int ddiff = 0;
     int pdiff = 0;
@@ -997,11 +998,24 @@ PROXY_DECLARE(const char *) ap_proxy_coo
             ent = (struct proxy_alias *)conf->cookie_paths->elts;
         }
         for (i = 0; i < conf->cookie_paths->nelts; i++) {
-            l2 = strlen(ent[i].fake);
-            if (l1 >= l2 && strncmp(ent[i].fake, pathp, l2) == 0) {
-                newpath = ent[i].real;
-                pdiff = strlen(newpath) - l1;
-                break;
+            if (ent[i].regex) {
+                if (!ap_regexec_len(ent[i].regex, pathp, l1, AP_MAX_REG_MATCH,
+                                    regm, 0)) {
+                    if (ent[i].real[0] == '!' && ent[i].real[1] == '\0')
+                        break;
+                    newpath = ap_pregsub(r->pool, ent[i].real, pathp,
+                                         AP_MAX_REG_MATCH, regm);
+                    pdiff = strlen(newpath) - l1;
+                    break;
+                }
+            }
+            else {
+                l2 = strlen(ent[i].fake);
+                if (l1 >= l2 && strncmp(ent[i].fake, pathp, l2) == 0) {
+                    newpath = ent[i].real;
+                    pdiff = strlen(newpath) - l1;
+                    break;
+                }
             }
         }
     }