RPL_ADMINME is a response the client receives using the ADMIN command.
Charybdis used to implement a non-standard version of this.
The RFC 1459 standard [1] says in section "6.2 Command responses.":
256 RPL_ADMINME
"<server> :Administrative info"
This commit corrects the behavior to follow the standard.
[1]: https://tools.ietf.org/html/rfc1459