Process 'name' option for all route-registering modules

Process 'name' option for all route-registering modules

The option allows to set arbitrary text for disco#info identity name.
Previously, option 'name' was supported by mod_proxy65 and mod_http_upload
only. Now, all the following modules support this option as well:
- mod_disco
- mod_irc
- mod_muc
- mod_multicast
- mod_pubsub
- mod_vcard

Example:
```
modules:
  ...
  mod_disco:
    name: "Cool XMPP Server"
  ...
```