nsjail: update to 2.6 and fix template

+ don't git clone
+ fix musl
+ install manpage

Closes: #13093 [via git-merge-pr]
Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/nsjail/patches/musl.patch

@@ -0,0 +1,14 @@
+--- mnt.cc	2018-04-18 14:11:19.000000000 +0200
++++ mnt.cc	2018-04-21 13:07:43.814692651 +0200
+@@ -47,6 +47,11 @@
+ #include "subproc.h"
+ #include "util.h"
+ 
++#if !defined(ST_RELATIME)
++/* In musl libc this is not (yet?) defined */
++#define ST_RELATIME 4096
++#endif
++
+ namespace mnt {
+ 
+ #if !defined(MS_LAZYTIME)

srcpkgs/nsjail/template

@@ -1,28 +1,36 @@
 # Template file for 'nsjail'
 pkgname=nsjail
-version=2.4
-revision=2
+version=2.6
+revision=1
 build_style=gnu-makefile
-hostmakedepends="libnl3-devel git pkg-config protobuf-c bison flex"
-makedepends="libnl3-devel libcap-devel protobuf-devel"
+hostmakedepends="bison flex pkg-config protobuf-devel"
+makedepends="libnl3-devel protobuf-devel"
 short_desc="A light-weight process isolation tool"
 maintainer="Andrea Brancaleoni <abc@pompel.me>"
 license="Apache-2.0"
-homepage="https://github.com/google/nsjail"
+homepage="http://nsjail.com"
+distfiles="
+ https://github.com/google/nsjail/archive/${version}.tar.gz
+ https://github.com/google/kafel/archive/9a8568c8f91a91d93893a61a48665dc329e075f1.tar.gz
+"
+checksum="
+ 866c181266e33f94e22e1bba72c04883d8bd5694929b19d8aa183a72acc8519b
+ 6fc048e72499fd0bc0414e4ab9c32fabefc04a2a36a8af46799557aa3150d1dd
+"
 
-only_for_archs="armv6l armv7l x86_64"
+only_for_archs="aarch64 aarch64-musl armv5tel armv5tel-musl armv6l armv6l-musl armv7l armv7l-musl x86_64 x86_64-musl"
 
-CFLAGS="-Wno-error=format"
-
-do_fetch() {
-	git clone $homepage $wrksrc
-	cd $wrksrc
-	git checkout $version
+post_extract() {
+	rmdir kafel
+	ln -s ../kafel-* kafel
 }
-do_build() {
-	make CC=$CC
+
+pre_build() {
+	sed -i -e 's/\b\(\(C\(XX\)\?\|LD\)FLAGS\s*+=\)/override \1/g' Makefile kafel/build/Makefile.mk kafel/src/Makefile
 }
+
 do_install() {
 	vbin ${pkgname}
+	vman nsjail.1
 	vlicense LICENSE
 }