K 10
svn:author
V 7
glebius
K 8
svn:date
V 27
2013-12-25T03:24:20.475771Z
K 7
svn:log
V 449
Cleanup alias module handler register/unregister.

- Remove locking, since all module(9) events are running under &Giant.
- Use TAILQ for protocol handlers and fix a bug which led to
  infinite cycle. Bug found in VirtualBox [1]
- Simplify code everywhere.
- Fix documentation.

[1]  https://www.virtualbox.org/pipermail/vbox-dev/2013-November/011936.html

PR:		183792 [1]
Submitted by:	Valery Ushakov <uwe NetBSD.org> [1]
Sponsored by:	Nginx, Inc.

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