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
Fix some Windows-related problems.

- Fix an error relating to the unavailability of std::back_inserter.
- Fix two methods in hashcomp being exported twice.
- Remove some unimportant error messages.