git-daemon: SysV needs the signal handler reinstated.

Fixes the bug on (amongst others) Solaris that only the first
child ever is reaped.

Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

daemon.c

diff --git a/daemon.c b/daemon.c
index 4540e8d..8dcde73 100644
--- a/daemon.c
+++ b/daemon.c
@@ -794,6 +794,7 @@
 		}
 		break;
 	}
+	signal(SIGCHLD, child_handler);
 }
 
 static int set_reuse_addr(int sockfd)