Add 'if-host-match' option to m_sslinfo oper autologin configuration.•••This adds an option to perform the source host check (which is usually
performed on manual oper login) in addition to the certificate fingerprint
check when automatically logging in opers upon connection to the ircd.
Minor cleanup and documentation improvements.•••- Only show a generic failure message to the user upon oper failure
due to not having a secure connection or matching cert. fingerprint.
- Update the comment about oper:fingerprint as it can be a space
separated list of fingerprints and not just one.
- Improve a few code comments and formatting.
Remove the original line parameter of On{Pre,Post}Command.•••In the brave new world of message tags and alternate wire formats
this is no longer something that is appropriate to expose.
In reality it was only ever used by m_alias which now reconstitutes
the command name and parameters into a RFC 1459-style message for
whatever it needs to do.