man: Patch to adjust output width to terminal

Fixes https://github.com/termux/termux-app/issues/162

packages/man/build.sh

@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE=http://mdocml.bsd.lv/
 TERMUX_PKG_DESCRIPTION="Man page viewer from the mandoc toolset"
 TERMUX_PKG_VERSION=1.13.4
-TERMUX_PKG_BUILD_REVISION=2
+TERMUX_PKG_BUILD_REVISION=3
 TERMUX_PKG_SRCURL=http://mdocml.bsd.lv/snapshots/mdocml-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_DEPENDS="less,libandroid-glob,libsqlite"
 TERMUX_PKG_BUILD_IN_SRC=yes

packages/man/term_ascii.c.patch

@@ -0,0 +1,38 @@
+The man implementation from mandoc does not adjust its output size to the terminal. As this is nice to have on smaller screens such as Termux we patch this in using the following patch adapted from
+
+https://groups.google.com/forum/#!topic/fa.openbsd.tech/AEDMaZmzSU4
+
+diff -u -r ../mdocml-1.13.4/term_ascii.c ./term_ascii.c
+--- ../mdocml-1.13.4/term_ascii.c	2016-07-14 07:13:40.000000000 -0400
++++ ./term_ascii.c	2016-09-26 18:06:08.339737451 -0400
+@@ -18,6 +18,7 @@
+ #include "config.h"
+ 
+ #include <sys/types.h>
++#include <sys/ioctl.h>
+ 
+ #include <assert.h>
+ #if HAVE_WCHAR
+@@ -64,12 +65,22 @@
+ 	char		*v;
+ #endif
+ 	struct termp	*p;
++	struct winsize	ws;
++	int		tfd;
+ 
+ 	p = mandoc_calloc(1, sizeof(struct termp));
+ 
+ 	p->line = 1;
+ 	p->tabwidth = 5;
+ 	p->defrmargin = p->lastrmargin = 78;
++	if ((tfd = open("/dev/tty", O_RDWR, 0)) != -1) {
++		if (ioctl(tfd, TIOCGWINSZ, &ws) != -1) {
++			if (ws.ws_col < 80)
++				p->defrmargin = p->lastrmargin = ws.ws_col - 2;
++		}
++		close(tfd);
++	}
++
+ 	p->fontq = mandoc_reallocarray(NULL,
+ 	     (p->fontsz = 8), sizeof(enum termfont));
+ 	p->fontq[0] = p->fontl = TERMFONT_NONE;