sysutils/cdrtools: Unbreak on DragonFly

The Makefile.DragonFly hack stopped working, so fix this properly.
No-op for FreeBSD.
Update to use native sigar library.
x11-toolkits/iwidgets: mutually agreed maintainship change

PR:		195166
Old maintainer:	pauls (utdallas.edu)
New maintainer:	Chris Hutchinson
cad/geda: fix gsch2pcb utility by using gnu M4

PR:		195155
Submitted by:	Tobias Rehbein
devel/byaccj: Add distfile mirror in addition to SourceForge

PR:		195175
Submitted by:	Fonz
Update shoutcast binary server to release 2.4.2 b167

Phabric:	D1186
Submitted by:	limmoan@tut.by
Reviewed by:	bdrewery (mentor)
Adding missing deps, oops.
www/calendarserver: Fix issues on FreeBSD 10

 * fix RC script
 * Limit to python 2
 * update txdav/base/propertystore for FreeBSD 10
 * clean up and remove @dir* (by marino)

PR:		194457
Submitted by:	holger (freyther.de)
Final fix:	Axel Rau (maintainer)
www/polipo: Fix use of cache directory

PR:		194813
Submitted by:	WATANABE Kazuhiro
Approved by:	maintainer (Frank Behrens)