lib/srdb1: detect if ipv6 address is between square brakets

- if not, let it be host part with surrounding brakets, because it can
by a mysql conf group name

src/lib/srdb1/db_id.c

@@ -29,6 +29,7 @@
 #include "db_id.h"
 #include "../../core/dprint.h"
 #include "../../core/mem/mem.h"
+#include "../../core/resolve.h"
 #include "../../core/pt.h"
 #include "../../core/ut.h"
 #include <stdlib.h>
@@ -111,6 +112,7 @@ static int parse_db_url(struct db_id* id, const str* url)
 	unsigned int len, i, j, a, foundanother, ipv6_flag=0;
 	const char* begin;
 	char* prev_token;
+	str sval = STR_NULL;
 
 	foundanother = 0;
 	prev_token = 0;
@@ -253,7 +255,14 @@ static int parse_db_url(struct db_id* id, const str* url)
 		case ST_HOST6:
 			switch(url->s[i]) {
 			case ']':
-				ipv6_flag = 1;
+				sval.s = (char*)begin;
+				sval.len = url->s + i - begin;
+				if(str2ip6(&sval)==NULL) {
+					ipv6_flag = 0;
+					begin -= 1;
+				} else {
+					ipv6_flag = 1;
+				}
 				st = ST_HOST;
 				break;
 			}