BUG/MEDIUM: misplaced exit and wrong exit code

Commit cb11fd2 ("MEDIUM: mworker: wait mode on reload failure")
introduced a regression, when HAProxy is used in daemon mode, it exits 1
after forking its children.

HAProxy should exit(0), the exit(EXIT_FAILURE) was expected to be use
when the master fail in master-worker mode.

Thanks to Emmanuel Hocdet for reporting this bug. No backport needed.
1 file changed