WebAdmin: Set TLS username to empty string if disabled

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

go.mod

@@ -160,7 +160,7 @@ require (
 	golang.org/x/tools v0.9.1 // indirect
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20230524185152-1884fd1fac28 // indirect
+	google.golang.org/genproto v0.0.0-20230525154841-bd750badd5c6 // indirect
 	google.golang.org/grpc v1.55.0 // indirect
 	google.golang.org/protobuf v1.30.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect

go.sum

@@ -2816,8 +2816,8 @@ google.golang.org/genproto v0.0.0-20230113154510-dbe35b8444a5/go.mod h1:RGgjbofJ
 google.golang.org/genproto v0.0.0-20230124163310-31e0e69b6fc2/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
 google.golang.org/genproto v0.0.0-20230125152338-dcaf20b6aeaa/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
 google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
-google.golang.org/genproto v0.0.0-20230524185152-1884fd1fac28 h1:+55/MuGJORMxCrkAgo2595fMAnN/4rweCuwibbqrvpc=
+google.golang.org/genproto v0.0.0-20230525154841-bd750badd5c6 h1:62QuyPXKEkZpjZesyj5K5jABl6MnSnWl+vNuT5oz90E=
-google.golang.org/genproto v0.0.0-20230524185152-1884fd1fac28/go.mod h1:nKE/iIaLqn2bQwXBg8f1g2Ylh6r5MN5CmZvuzZCgsCU=
+google.golang.org/genproto v0.0.0-20230525154841-bd750badd5c6/go.mod h1:nKE/iIaLqn2bQwXBg8f1g2Ylh6r5MN5CmZvuzZCgsCU=
 google.golang.org/grpc v0.0.0-20160317175043-d3ddb4469d5a/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=

openapi/openapi.yaml

@@ -5511,10 +5511,7 @@ components:
           description: 'maximum allowed size, as bytes, for a single file upload. The upload will be aborted if/when the size of the file being sent exceeds this limit. 0 means unlimited. This restriction does not apply for SSH system commands such as `git` and `rsync`'
         tls_username:
           type: string
-          enum:
+          description: 'defines the TLS certificate field to use as username. For FTP clients it must match the name provided using the "USER" command. For WebDAV, if no username is provided, the CN will be used as username. For WebDAV clients it must match the implicit or provided username. Ignored if mutual TLS is disabled. Currently the only supported value is `CommonName`'
-            - None
-            - CommonName
-          description: 'defines the TLS certificate field to use as username. For FTP clients it must match the name provided using the "USER" command. For WebDAV, if no username is provided, the CN will be used as username. For WebDAV clients it must match the implicit or provided username. Ignored if mutual TLS is disabled'
         hooks:
           $ref: '#/components/schemas/HooksFilter'
         disable_fs_checks:

templates/webadmin/group.html

@@ -684,7 +684,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
                                 <label for="idTLSUsername" class="col-sm-2 col-form-label">TLS username</label>
                                 <div class="col-sm-10">
                                     <select class="form-control selectpicker" id="idTLSUsername" name="tls_username" aria-describedby="tlsUsernameHelpBlock">
-                                        <option value="None" {{if eq .Group.UserSettings.Filters.TLSUsername "None" }}selected{{end}}>None</option>
+                                        <option value="" {{if or (eq .Group.UserSettings.Filters.TLSUsername "None") (eq .Group.UserSettings.Filters.TLSUsername "") }}selected{{end}}>None</option>
                                         <option value="CommonName" {{if eq .Group.UserSettings.Filters.TLSUsername "CommonName" }}selected{{end}}>Common Name</option>
                                     </select>
                                     <small id="tlsUsernameHelpBlock" class="form-text text-muted">

templates/webadmin/user.html

@@ -964,7 +964,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
                                 <label for="idTLSUsername" class="col-sm-2 col-form-label">TLS username</label>
                                 <div class="col-sm-10">
                                     <select class="form-control selectpicker" id="idTLSUsername" name="tls_username" aria-describedby="tlsUsernameHelpBlock">
-                                        <option value="None" {{if eq .User.Filters.TLSUsername "None" }}selected{{end}}>None</option>
+                                        <option value="" {{if or (eq .User.Filters.TLSUsername "None") (eq .User.Filters.TLSUsername "") }}selected{{end}}>None</option>
                                         <option value="CommonName" {{if eq .User.Filters.TLSUsername "CommonName" }}selected{{end}}>Common Name</option>
                                     </select>
                                     <small id="tlsUsernameHelpBlock" class="form-text text-muted">