versioncontrol_svn 5.x-1.2-rc1

Better handling of 'svn' invocations in order to fix #227446: exec statements and get more info on #227560: VCS Repository settings Not finding repository.

This is a release candidate and should be working just as well as the previous release, but that's not guaranteed. If you want the tested-and-tried version, go with 5.x-1.1 instead of this one.