Log Message:
Another round of update to collectd:
 * Add support for the "irq" plugin on NetBSD.
 * Declare BUILD_DEFS+= VARBASE to silence pkglint.
 * Tweak Makefile.am instead; commit regenerated Makefile.in with automake.
 * Adjust the patch for the df plugin so it builds both in newer (> 6.99.19)
   and older NetBSD (e.g. 6.1.5)
 * Adjust the entropy plugin to use <paths.h> and _PATH_URANDOM
   to silence pkglint.
PKGREVISION bumped to 5.