testing/docbook2mdoc: new aport

See #11674.

testing/docbook2mdoc/APKBUILD

+# Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
+# Maintainer:
+pkgname=docbook2mdoc
+pkgver=1.1.0
+pkgrel=0
+pkgdesc="DocBook to mdoc converter"
+url="https://mandoc.bsd.lv/docbook2mdoc/"
+arch="all"
+license="ISC"
+makedepends="bsd-compat-headers"
+subpackages="$pkgname-doc"
+options="!check" # no test suite
+source="https://mandoc.bsd.lv/docbook2mdoc/snapshots/docbook2mdoc-$pkgver.tgz
+	fix-mandir.patch
+	strtonum.patch"
+
+build() {
+	make
+}
+
+package() {
+	make DESTDIR="$pkgdir" PREFIX=/usr install
+}
+
+sha512sums="d935a12de59a1b91f51b3ddcc1047ce6e46f0490852c3ab1191402f6c2f9d8e79c57b1ad67ac7b2527c9aa4788f027ca6b83dffbcfed756af0422858713101be  docbook2mdoc-1.1.0.tgz
+ff477e2f01275fa1dbcdb9c157c7086de76a66683855fba5cd7ac4c1fe0d258fde4869f4de12a740b5c0eee76e4f89d9e89fea9c528cfa0a4f2cf5bd9ebe3982  fix-mandir.patch
+d39eab31a4724bebc173f8b1a632049c4cf05c5aac9301b505fc968817fbed07a9227d8dffb1f059c59be8f2d93ed4ead18a8b09458cbff29d1643ecfa7b946d  strtonum.patch"

testing/docbook2mdoc/fix-mandir.patch

+OpenBSD uses $(PREFIX)/man as a MANDIR, we use $(PREFIX)/share/man.
+
+diff -upr docbook2mdoc-1.1.0.orig/Makefile docbook2mdoc-1.1.0/Makefile
+--- docbook2mdoc-1.1.0.orig/Makefile	2020-12-29 10:24:38.687808981 +0100
++++ docbook2mdoc-1.1.0/Makefile	2020-12-29 10:25:00.454608509 +0100
+@@ -20,9 +20,9 @@ www: docbook2mdoc.1.html docbook2mdoc-$(
+ 
+ install: all
+ 	mkdir -p $(DESTDIR)$(PREFIX)/bin
+-	mkdir -p $(DESTDIR)$(PREFIX)/man/man1
++	mkdir -p $(DESTDIR)$(PREFIX)/share/man/man1
+ 	install -m 0755 docbook2mdoc $(DESTDIR)$(PREFIX)/bin
+-	install -m 0444 docbook2mdoc.1 $(DESTDIR)$(PREFIX)/man/man1
++	install -m 0444 docbook2mdoc.1 $(DESTDIR)$(PREFIX)/share/man/man1
+ 
+ installwww: www
+ 	mkdir -p $(WWWPREFIX)/snapshots

testing/docbook2mdoc/strtonum.patch

+musl doesn't have strtonum, import it from OpenBSD.
+
+diff -upr docbook2mdoc-1.1.0.orig/Makefile docbook2mdoc-1.1.0/Makefile
+--- docbook2mdoc-1.1.0.orig/Makefile	2020-12-29 10:20:53.933977196 +0100
++++ docbook2mdoc-1.1.0/Makefile	2020-12-29 10:21:24.500779954 +0100
+@@ -4,8 +4,8 @@ WWWPREFIX = /var/www/vhosts/mdocml.bsd.l
+ PREFIX = /usr/local
+ 
+ HEADS =	xmalloc.h node.h parse.h reorg.h macro.h format.h
+-SRCS =	xmalloc.c node.c parse.c reorg.c macro.c docbook2mdoc.c tree.c main.c
+-OBJS =	xmalloc.o node.o parse.o reorg.o macro.o docbook2mdoc.o tree.o main.o
++SRCS =	xmalloc.c node.c parse.c reorg.c macro.c docbook2mdoc.c tree.c main.c strtonum.c
++OBJS =	xmalloc.o node.o parse.o reorg.o macro.o docbook2mdoc.o tree.o main.o strtonum.o
+ DISTFILES = Makefile NEWS docbook2mdoc.1
+ 
+ all: docbook2mdoc
+diff -upr docbook2mdoc-1.1.0.orig/strtonum.c docbook2mdoc-1.1.0/strtonum.c
+--- docbook2mdoc-1.1.0.orig/strtonum.c	2020-12-29 10:22:06.460966781 +0100
++++ docbook2mdoc-1.1.0/strtonum.c	2020-12-29 10:21:09.747380938 +0100
+@@ -0,0 +1,66 @@
++/*	$OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther Exp $	*/
++
++/*
++ * Copyright (c) 2004 Ted Unangst and Todd Miller
++ * All rights reserved.
++ *
++ * Permission to use, copy, modify, and distribute this software for any
++ * purpose with or without fee is hereby granted, provided that the above
++ * copyright notice and this permission notice appear in all copies.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
++ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
++ */
++
++#include <errno.h>
++#include <limits.h>
++#include <stdlib.h>
++
++#define	INVALID		1
++#define	TOOSMALL	2
++#define	TOOLARGE	3
++
++long long
++strtonum(const char *numstr, long long minval, long long maxval,
++    const char **errstrp)
++{
++	long long ll = 0;
++	int error = 0;
++	char *ep;
++	struct errval {
++		const char *errstr;
++		int err;
++	} ev[4] = {
++		{ NULL,		0 },
++		{ "invalid",	EINVAL },
++		{ "too small",	ERANGE },
++		{ "too large",	ERANGE },
++	};
++
++	ev[0].err = errno;
++	errno = 0;
++	if (minval > maxval) {
++		error = INVALID;
++	} else {
++		ll = strtoll(numstr, &ep, 10);
++		if (numstr == ep || *ep != '\0')
++			error = INVALID;
++		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
++			error = TOOSMALL;
++		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
++			error = TOOLARGE;
++	}
++	if (errstrp != NULL)
++		*errstrp = ev[error].errstr;
++	errno = ev[error].err;
++	if (error)
++		ll = 0;
++
++	return (ll);
++}
++DEF_WEAK(strtonum);