ITS#9354 cleanup watcher

After initial contact, don't exit if a server goes down.
Also, don't wait forever for responses, use a timeout and
mention when a timeout occurs.
Simplify csn/sid handling, we know the max we expect so just
allocate the space in advance and keep a fixed sid to slot
mapping.

tests/progs/slapd-common.c

@@ -554,7 +554,9 @@ retry:;
 					}
 			}
 			ldap_unbind_ext( ld, NULL, NULL );
-			exit( EXIT_FAILURE );
+			ld = NULL;
+			if ( !( flags & TESTER_INIT_NOEXIT ))
+				exit( EXIT_FAILURE );
 		}
 	}
 

tests/progs/slapd-common.h

@@ -66,6 +66,7 @@ struct tester_conn_args {
 };
 
 #define TESTER_INIT_ONLY (1 << 0)
+#define TESTER_INIT_NOEXIT (1 << 1)
 #define TESTER_COMMON_OPTS "CD:d:H:h:L:l:i:O:p:R:U:X:Y:r:t:w:x"
 #define TESTER_COMMON_HELP \
 	"[-C] " \