Clean up error messages in a few SA commands
m_sakick Replace C string with C++ string
Remove unused motd and rules field from ServerConfig
Fix issues discovered by Coverity

- Fix resource leak in InspIRCd::Format()
- Explicitly set NewServices to NULL before the object it points to goes out of scope
Clean up CoreException

- Remove default constructor
- Replace virtual functions returning C strings with functions returning const std::string refs
m_spanningtree Fix clang warning and wrong operator in if
m_auditorium Switch to SimpleChannelModeHandler
Add m_showfile, remove cmd_rules
Fix FileReader not working with files specified in <files>
Add m_ldap, and convert m_ldapoper and m_ldapauth to use it.
m_filter Remove ImplFilter and needless dynamic_cast