Enlage buffers of info texts to 128 bytes.

This includes:
- "Real name" of a client (4th filed of the USER command).
- Server info text ("Info" configuration option).
- Admin info texts and email address ("AdminInfo1", "AdminInfo2" and
  "AdminEmail" configuration options).
- Network name ("Network" configuration option).

The limit was 64 bytes before ...

Closes #258.