Add triggers documentation to dpkg-dev

Closes: #473449

debian/changelog

@@ -2,6 +2,7 @@ dpkg (1.14.18) UNRELEASED; urgency=low
 
   * Bump po4a version in Build-Depends to 0.33.1-1, as usage of UTF-8
     in original man pages was causing build failures. Closes: #473498
+  * Add triggers documentation to dpkg-dev. Closes: #473449
 
  -- Guillem Jover <guillem@debian.org>  Sun, 30 Mar 2008 13:04:29 +0300
 

debian/dpkg.docs

@@ -3,3 +3,4 @@ THANKS
 debian/usertags
 README.api
 README.feature-removal-schedule
+doc/triggers.txt