Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

lib/timerqueue.c

diff --git a/lib/timerqueue.c b/lib/timerqueue.c
index e3a1050..191176a 100644
--- a/lib/timerqueue.c
+++ b/lib/timerqueue.c
@@ -5,7 +5,7 @@
  *  Uses rbtrees for quick list adds and expiration.
  *
  *  NOTE: All of the following functions need to be serialized
- *  to avoid races. No locking is done by this libary code.
+ *  to avoid races. No locking is done by this library code.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by