NEWS: memorialize Argure's commentary on atheme EOL forever
Ignore CTCP messages that begin with space characters
Add myself to contributors
protocol/inspircd: Ensure ircd-side topic lock state is always what we think it should be
NEWS.md: Begin Shaltúre news section
nickserv/multimark: message/fault consistency fixes
chanserv/topicswap: better parameter checks to avoid crash

Fixes atheme/atheme#400.