The 5.5.30 and 6.0.28 (I haven't checked 7.0) binary releases of Tomcat no longer ship bin/jsvc.tar.gz. A look at the changelog leads me to believe this is intentional. The documentation (setup.html), however, still refers to that file. In particular, the sentence "Source tarballs for jsvc are included with the Tomcat binaries" is no longer correct.
It is in commons-daemon-native.tar.gz Yep, the docs need to be updated
Fixed in Tomcat 5.5.x, 6.0.x and 7.0.x and will be included in the next release of each.