instead of pretending it suicceed and not recursing in it.
This fixes a bug in which a folder with a too long name would be properly
created, then removed on the server in the next sync.
(cherry picked from commit 4bbf7669091cde7ec726b1708d8c54427b68f016)
Conflicts:
csync/src/csync.h
csync/src/csync_exclude.h
csync/src/csync_update.c