m_ldapauth whitelisting should compare against a user mask.

[sadiepowell]

Currently LDAP whitelisting works via two methods. For nicks it uses space delimited values in <ldapauth:allowpattern> and for CIDR ranges it uses a series of <ldapwhitelist:mask> tags.

It would be useful that instead of this it could instead take a list of nick!user@host or nick!user@ip/cidr masks instead.

[sadiepowell]

We should also do this for m_sqlauth.