Add manpage

OBS-URL: https://build.opensuse.org/package/show/security:netfilter/nftables?expand=0&rev=9

nftables.spec

@@ -31,6 +31,7 @@ Source2:        http://xtables.de/files/nftables-plus-%version.tar.asc
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  bison
 BuildRequires:  dblatex
+BuildRequires:  docbook2x
 BuildRequires:  flex
 BuildRequires:  gmp-devel
 BuildRequires:  pkgconfig >= 0.21
@@ -65,6 +66,9 @@ ruleset updates.
 %setup -qn %name-plus-%version
 
 %build
+mkdir bin
+ln -s "%_bindir/docbook-to-man" bin/docbook2x-man
+export PATH="$PATH:$PWD/bin"
 %configure --docdir="%_docdir/%name"
 make %{?_smp_mflags}
 
@@ -78,5 +82,6 @@ cp -a COPYING "$b/%_docdir/%name/"
 %config %_sysconfdir/nftables
 %_sbindir/nft
 %doc %_docdir/%name/
+%_mandir/man8/nft*
 
 %changelog