ui-log.c: allow commit range as search expression

Inspired-by: Johan Herland <johan@herland.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-log.c

@@ -146,10 +146,13 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
 
 	argv[1] = disambiguate_ref(tip);
 
-	if (grep && pattern && (!strcmp(grep, "grep") ||
-				!strcmp(grep, "author") ||
-				!strcmp(grep, "committer")))
-		argv[argc++] = fmt("--%s=%s", grep, pattern);
+	if (grep && pattern) {
+		if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
+		    !strcmp(grep, "committer"))
+			argv[argc++] = fmt("--%s=%s", grep, pattern);
+		if (!strcmp(grep, "range"))
+			argv[1] = pattern;
+	}
 
 	if (path) {
 		argv[argc++] = "--";

ui-shared.c

@@ -738,6 +738,7 @@ void cgit_print_pageheader(struct cgit_context *ctx)
 		html_option("grep", "log msg", ctx->qry.grep);
 		html_option("author", "author", ctx->qry.grep);
 		html_option("committer", "committer", ctx->qry.grep);
+		html_option("range", "range", ctx->qry.grep);
 		html("</select>\n");
 		html("<input class='txt' type='text' size='10' name='q' value='");
 		html_attr(ctx->qry.search);