This reverts commit 608bbb6d.

Conflicts:

	debian/changelog

Add patch headers to all patch files, report most patches upstream. Waiting for feedback and quotable URLs from NoMachine.

  - 005_add-nxagent-wrapper.patch.
  - 008_add-nxproxy-wrapper.patch.
  - 011_add-nxauth-wrapper.patch.

Set homepage of X2Go upstream project (using http://wiki.x2go.org). Packaging Vcs has been relocated to Alioth.

Add patch: 019_nx-x11_expat-build-against-system-libxmltok.patch, fixes lintian error: embedded-library: expat. Build-depend on libxmltok1-dev.

  - libnx-x11: postinst-has-useless-call-to-ldconfig
  - libnx-x11: postrm-has-useless-call-to-ldconfig
  as they relate to a bug in debhelper (call of ldconfig although we did not
  touch any directory controlled by /etc/ld.so.conf, amongst others
  see BTS issue #205142).