* repeater and room server: enable downgrading permissions on guest login

examples/simple_repeater/MyMesh.cpp

@@ -114,6 +114,7 @@ uint8_t MyMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secr
     MESH_DEBUG_PRINTLN("Login success!");
     client->last_timestamp = sender_timestamp;
     client->last_activity = getRTCClock()->getCurrentTime();
+    client->permissions &= ~0x03;
     client->permissions |= perms;
     memcpy(client->shared_secret, secret, PUB_KEY_SIZE);
 

examples/simple_room_server/MyMesh.cpp

@@ -286,7 +286,7 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
     data[len] = 0;                                        // ensure null terminator
 
     ClientInfo* client = NULL;
-    if (data[8] == 0 && !_prefs.allow_read_only) {   // blank password, just check if sender is in ACL
+    if (data[8] == 0) {   // blank password, just check if sender is in ACL
       client = acl.getClient(sender.pub_key, PUB_KEY_SIZE);
       if (client == NULL) {
       #if MESH_DEBUG
@@ -322,6 +322,7 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
       client->extra.room.push_failures = 0;
 
       client->last_activity = getRTCClock()->getCurrentTime();
+      client->permissions &= ~0x03;
       client->permissions |= perm;
       memcpy(client->shared_secret, secret, PUB_KEY_SIZE);