Unify source tree reduction (debian/rules vs. roll-tarball.sh) via file/folder lists in text files named debian/CODE-REDUCTION_*.

  * Debian/Ubuntu packaging:
    + Fully rework the way nx-libs gets packaged for Debian/Ubuntu.
    + Split up libnx-x11 into individual packages.
    + Provide dbg:packages for each bin:package containing binaries.
    + Use Makefile logic to install files into DESTDIR.
    + Provide dev:packages for each lib:package individually.
    + Provide nx-x11proto-*-dev packages for all libnx-* libraries.
    + Install _all_ library files (*.so*) to /usr/lib/<triplet>/, so
      no extra settings of LD_LIBRARY_PATH is necessary.

debian/control: Turn libnx-*-dev packages into dummy packages. Shipping development files for nx-X11 makes no sense. No other programme build against nx-X11's header files except nxagent itself.

fix lintian: missing-separator-between-items in x2goagent depends field between nxagent (>= ${source:Version}) and ${misc:Depends}

If stricter dependencies are really required, they should absolutely be
specified in the shlibs file instead.

The Debian xterm package depends on xbitmaps.  This change allows
compiling on a host that has xterm installed.

According to lintian, this is a severe error. Demote to recommends to
ensure that it still gets installed by default.

this package contains debugging information for all code that is built
from this source package.

Add patch: 210_nxagent_configurable-keystrokes.full.patch, replaces the hardcoded nxagent keybindings by a configurable table of keybindings.

/debian/control: Maintainer change in package: X2Go Developers <x2go-dev@lists.berlios.de>. Priority: optional.

This reverts commit ab04ba21.

Fix lintian issue: missing-separator-between-items for x2goagent package. Drop dependency on libnx-x11 as we already depend on nxagent and fix description synopsis of x2goagent package.

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