Merge pull request #2140 from slingamn/issue2139

fix #2139

irc/database.go

 func performAutoUpgrade(currentVersion int, config *Config) (err error) {
 	path := config.Datastore.Path
 	log.Printf("attempting to auto-upgrade schema from version %d to %d\n", currentVersion, latestDbSchema)
-	timestamp := time.Now().UTC().Format("2006-01-02-15:04:05.000Z")
+	timestamp := time.Now().UTC().Format("2006-01-02-15.04.05.000Z")
 	backupPath := fmt.Sprintf("%s.v%d.%s.bak", path, currentVersion, timestamp)
 	log.Printf("making a backup of current database at %s\n", backupPath)
 	err = utils.CopyFile(path, backupPath)

irctest

-Subproject commit ee6c56d84bdd3467795f97f1da2d697ad4999fbd
+Subproject commit 0c5c91368a584ea734f91884c031f3893c368e1d