- fix build when DEBUG is set
PR:		180361
Submitted by:	Raphael Kubo da Costa
Add GNU m4 as run dependency of flex

Submitted by:	antoine
Fix man page CONFLICTS with graphics/poppler.

Pointy hat to:	myself, missed in r296465.
Pointed out by:	Jan Henrik Sylvester <me@janh.de>
Approved by:	araujo (Maintainer)
- Update SWI Prolog to 6.2.6
- Remove patches now included upstream
- Add option to use libiodbc (inspired by [1])
- Adopt port

PR:		ports/172837 [1]
Submitted by:	C. P. Ghost <cpghost@cordula.ws>
xterm patch #294 supports experimental sixel graphics. Provide an option.

PR:		180448
Submitted by:	IWAMOTO Kouichi <sue@iwmt.org>
Reset maintainer (email is bouncing)
While here:
- Trim headers
- Convert to USES where applicable
- Bump klamav portrevision (pkgconfig is not a run dep anymore)
Mark job unsafe (fails with -j24)
Use options helpers