SSL_TLS_SNI currently does not appear in any documentation. 2.2.12 was when SNI was added to http. line 1135 httpd-2.2.12/modules/ssl/ssl_engine_kernel.c line 1141 in http-2.2.23 line 1133 httpd-2.4.3 should be here. http://httpd.apache.org/docs/2.4/mod/mod_ssl.html#envvars
Created attachment 29916 [details] suggestion
Added via r1448599, r1448600, r1448601, r1448605, r1448609 andr1448611. Thanks for reporting this!