print/a2ps-a4

Add libpaper support to print/a2ps-*[1], print/c2ps-*, print/lprps-*, graphics/jpeg2ps-*, and merge the papersize-suffixed versions into single ones respectively as print/psutils did.

Approved by:	dinoex (maintainer) [1]

- cleanup comments

Update with the new PORTNAME/PORTVERSION variables

$Id$ -> $FreeBSD$

Remove LOOP_VAR and replace it with tiny Makefiles using MASTERDIR to share most files.  Repository copy the default to explicitly named directories to avoid any confusion.  Greatly simplify the shared Makefiles, since we are now in different subdirectories, we don't need "a4-install" stuff.

While I'm here, consistently name the variables.  Here are the
guidelines (master port is in brackets)

DOCFORMAT:	[html] pdf ps
KONFONT:	14dot [16dot]
PAPERSIZE:	a4 [letter] letterdj
RESOLUTION:	118 240 [300] 360 400 600

"math/r" has been copied to "R-a4" and "R-letter", to follow the
spirit of the original port.  "japanese/kon" is renamed to "kon2-*",
since that seems to be the basename.