Minor code fix [CI SKIP]

cmd/web.go

 	if err != nil {
 		log.Fatal(4, "Fail to read 'templates/.VERSION': %v", err)
 	}
-	if string(data) != setting.AppVer {
-		log.Fatal(4, "Binary and template file version does not match, did you forget to recompile?")
+	tplVer := string(data)
+	if tplVer != setting.AppVer {
+		if version.Compare(tplVer, setting.AppVer, ">") {
+			log.Fatal(4, "Binary version is lower than template file version, did you forget to recompile Gogs?")
+		} else {
+			log.Fatal(4, "Binary version is higher than template file version, did you forget to update template files?")
+		}
 	}
 
 	// Check dependency version.

models/migrations/migrations.go

 // If you want to "retire" a migration, remove it from the top of the list and
 // update _MIN_VER_DB accordingly
 var migrations = []Migration{
+	// v0 -> v4: before 0.6.0 -> 0.7.33
 	NewMigration("fix locale file load panic", fixLocaleFileLoadPanic),                           // V4 -> V5:v0.6.0
 	NewMigration("trim action compare URL prefix", trimCommitActionAppUrlPrefix),                 // V5 -> V6:v0.6.3
 	NewMigration("generate issue-label from issue", issueToIssueLabel),                           // V6 -> V7:v0.6.4

models/repo_mirror.go

 	}
 
 	if _, stderr, err := process.ExecDir(
-		timeout, repoPath, fmt.Sprintf("runSync: %s", repoPath),
+		timeout, repoPath, fmt.Sprintf("Mirror.runSync: %s", repoPath),
 		"git", gitArgs...); err != nil {
 		desc := fmt.Sprintf("Fail to update mirror repository '%s': %s", repoPath, stderr)
 		log.Error(4, desc)
 	}
 	if m.Repo.HasWiki() {
 		if _, stderr, err := process.ExecDir(
-			timeout, wikiPath, fmt.Sprintf("runSync: %s", wikiPath),
+			timeout, wikiPath, fmt.Sprintf("Mirror.runSync: %s", wikiPath),
 			"git", "remote", "update", "--prune"); err != nil {
 			desc := fmt.Sprintf("Fail to update mirror wiki repository '%s': %s", wikiPath, stderr)
 			log.Error(4, desc)