Three things are needed:
libsvn_repos/hooks.c : needs to return different error codes for
*which* hook failed (not just SVN_ERR_REPOS_HOOK_FAILURE).
libsvn_ra_* and mod_dav_svn : need to not lose the above error
code (this may not be an issue, but just making sure), and should
still do any post-commit processing if the hook failure happened
*after* a successfully commit. In other words, if the error was
from a failed POST-COMMIT hook, don't just propogate that
sucker.
libsvn_client/commit.c : needs to still do post-commit processing
if the RA layer reports that the only problem was with the post-
commit hook script.
Bug
Critical
