m_spanningtree Set the bursting flag in the FJOIN handler based on whether the source of the FJOIN is bursting or not

Previously the flag was true if our route to the source was bursting, which resulted in m_joinflood incorrectly registering netjoins when a remote server was bursting

Fixes issue #839 reported by @joshtek0
m_spanningtree Advertise the availability of m_globops in CAPAB CAPABILITIES
m_cgiirc Call User::InvalidateCache() after changing host and dhost in OnCheckReady()
Do not export callers

Their functions are all inlined and Windows gives unresolved symbol errors
Fix m_permchannels and m_xline_db on Windows

The call to remove() can fail if the database doesn't already exist. Just
ignore the error, which effectively makes the rename() call below work as
it does on nix
Update year in resource file for Windows
Replace deprecated entry in launchd config with the modern equivalent.
Merge pull request #854 from SaberUK/insp20+deprecated-plist-entry

Replace deprecated entry in launchd config with the modern equivalent.
Update server.cpp

Rewrote "invalid credentials" error message to remove confusion regarding "server snomask", which some users interpreted as "I must make sure the snomask on each server is identical" (which makes no sense), when really the intention is basically "look at the logs on the other server".
m_spanningtree Fix cleanup of connections when unloading a module that provides an IOHook
m_spanningtree Forward NICK messages when they cause a collision with the new nick param rewritten to the uuid

Suppressing these messages meant that we relied on an appropriate NICK to
come from the direction the SAVE was sent to; this left all servers behind
us uninformed until the target server of the SAVE reacted with a nick change
to uuid.

This was problematic because someone can legitimately change nick to the
past nick of the SAVEd user on a server that already has the SAVEd user
with the uuid nick and that nick change message can reach servers that
haven't yet seen the nick change to uuid of the SAVEd user.
Fix harmless loop off-by-ones found by Moonlightning
remove unneeded whitespace from the docs/examples
Merge pull request #872 from theckman/remove_whitespace_from_docs

Remove whitespace from docs