m_ldapoper Fix memory leak

See 1813369adecc1efc9812e90c40c21dc32e4965c9 for details
m_ldapoper Make the module actually work

Fixes #439 reported by @rhylan
Update doc and fix the description of m_allowinvite
cmd_kill Send snotice to servers when both the oper and the victim are on the same server
Release 2.0.11
Minor update to example configs