Default MSSQL port 0 to allow automatic detection by default (#11642) (#11673)

Backport #11642

Fix #11633

Signed-off-by: Andrew Thornton <art27@cantab.net>

modules/setting/database.go

@@ -163,7 +163,7 @@ func getPostgreSQLConnectionString(dbHost, dbUser, dbPasswd, dbName, dbParam, db
 
 // ParseMSSQLHostPort splits the host into host and port
 func ParseMSSQLHostPort(info string) (string, string) {
-	host, port := "127.0.0.1", "1433"
+	host, port := "127.0.0.1", "0"
 	if strings.Contains(info, ":") {
 		host = strings.Split(info, ":")[0]
 		port = strings.Split(info, ":")[1]