allow selective enabling of snapshots

snapshot configuration parameter now can be a
 space/slash/comma/colon/semicolon/pipe-separated list of snaphot suffixes as
 listed in ui-snapshot.c

Signed-off-by: Michael Krelin <hacker@klever.net>

cgit.c

@@ -70,7 +70,8 @@ static void cgit_print_repo_page(struct cacheitem *item)
 	if ((cgit_cmd == CMD_SNAPSHOT) && cgit_repo->snapshots) {
 		cgit_print_snapshot(item, cgit_query_sha1,
 				    cgit_repobasename(cgit_repo->url),
-				    cgit_query_name);
+				    cgit_query_name,
+				    cgit_repo->snapshots );
 		return;
 	}