for some reason $! doesnt work inside the forked process, so write PID file outside...
treeb09a5f017c0f5253d7a79efaf379b42494c7d43e
lrwxrwxrwx 7 git -> slowgit
-rwxr-xr-x 58 gitbackup-maildir-ssh
-rw-r--r-- 11358 gitbackup.c
-rwxr-xr-x 75 slowgit
-rwxr-xr-x 1829 ssd-gitbackup