Author: Kev <klmitch@mit.edu>

Author: Kev <klmitch@mit.edu>
Log message:

Pull-up of various features that have been added to the ircu2.10.10,
including such things as the advisory lock-based multiple execution
exclusion, K-lines by realname, and the HEAD_IN_SAND stuff.

Testing: The K-lines by real name are untested, and all of the K-line
infrastructure will need testing, owing to extensive changes to how they
work.

git-svn-id: file:///home/klmitch/undernet-ircu/undernet-ircu-svn/ircu2/trunk@419 c9e4aea6-c8fd-4c43-8297-357d70d61c8c