ngircd protocol module: really kill users

ngIRCd doesn't send a QUIT for each user KILL'ed, so kill them immediately.
hs_group: Allow automatic HS GROUP-ing on NS GROUP, and allow vhosts to be per account rather than nick.
ns_group: Don't require a nick param when logged in
irc2sql: removed the currentusers field from the chan table, keeping it updated on each join/part eats too many ressources
Remove mail:restrict as it is no longer useful. Changes nickserv/resetpass default to allow normal users to use it.
Add missing space to session exception expiration message
Make nickserv/glist show the correct expire time for unconfirmed nicks
Do not allow nickserv/ungroup to bypass ns_maxemail, and allow opers to bypass ns_maxemail
Fix compile error in m_sasl_dh-aes and m_sasl_dh-blowfish on unusually old g++ versions
Set nickserv's modesonid on login too
Do not send unregistered notice to users who are logged in, even if their nick isn't registered
Merge pull request #63 from alexbarton/ngircd-fix-KILL

ngircd protocol module: really kill users
Merge pull request #64 from ShutterQuick/2.0+hsgroupsync

2.0+hsgroupsync