some fix to #2026

.gopmfile

@@ -6,7 +6,7 @@ github.com/bradfitz/gomemcache = commit:72a68649ba
 github.com/codegangsta/cli = commit:0302d39
 github.com/go-macaron/binding = commit:864a5ce
 github.com/go-macaron/cache = commit:5617353
-github.com/go-macaron/captcha = commit:875ff77
+github.com/go-macaron/captcha = 
 github.com/go-macaron/csrf = commit:3372b25
 github.com/go-macaron/gzip = commit:4938e9b
 github.com/go-macaron/i18n = commit:5e728b6

models/login.go

@@ -410,7 +410,7 @@ func LoginUserPAMSource(u *User, name, passwd string, sourceId int64, cfg *PAMCo
 	// fake a local user creation
 	u = &User{
 		LowerName:   strings.ToLower(name),
-		Name:        strings.ToLower(name),
+		Name:        name,
 		LoginType:   PAM,
 		LoginSource: sourceId,
 		LoginName:   name,
@@ -418,8 +418,7 @@ func LoginUserPAMSource(u *User, name, passwd string, sourceId int64, cfg *PAMCo
 		Passwd:      passwd,
 		Email:       name,
 	}
-	err := CreateUser(u)
-	return u, err
+	return u, CreateUser(u)
 }
 
 func ExternalUserLogin(u *User, name, passwd string, source *LoginSource, autoRegister bool) (*User, error) {
@@ -443,7 +442,7 @@ func ExternalUserLogin(u *User, name, passwd string, source *LoginSource, autoRe
 func UserSignIn(uname, passwd string) (*User, error) {
 	var u *User
 	if strings.Contains(uname, "@") {
-		u = &User{Email: uname}
+		u = &User{Email: strings.ToLower(uname)}
 	} else {
 		u = &User{LowerName: strings.ToLower(uname)}
 	}

models/user.go

@@ -433,6 +433,7 @@ func CreateUser(u *User) (err error) {
 		return ErrUserAlreadyExist{u.Name}
 	}
 
+	u.Email = strings.ToLower(u.Email)
 	isExist, err = IsEmailUsed(u.Email)
 	if err != nil {
 		return err