Update included Debian package configuration
- Rewrite using current dh_make.
- Standards-Version: 4.6.2.
- No longer build 3 different packages; only build "ngircd" which now
includes support for IDENT, PAM (disabled in the ngircd.conf installed
by the package), SSL (OpenSSL), ZLib and IPv6.
- Update package description accordingly.
- No longer install a SysV init file, only install ngircd.service unit.
- [DH] contrib/Debian/.gitignore
- [DH] contrib/Debian/Makefile.am
- [DH] contrib/Debian/compat
- [DH] contrib/Debian/control
- [DH] contrib/Debian/copyright
- [DH] contrib/Debian/ngircd.default
- [DH] contrib/Debian/ngircd.init
- [DH] contrib/Debian/ngircd.pam
- [DH] contrib/Debian/ngircd.postinst
- [DH] contrib/Debian/rules
- [DH] contrib/Debian/source/format
- [DH] contrib/Debian/watch