Bug#544613: the role of the ncurses -dbg packages

[Sven Joachim <svenjoac@gmx.de>]

It seems to me that the relocation of the debug libraries in the "fix"
for bug #532022 was wrong, because these files do not contain detached
debugging symbols but rather different versions of the ncurses
libraries, compiled with trace information and unstripped.

The result is that we now have Lintian errors because dh_shlibdeps does
not look in the directories where these files are located now and the
packages thus lack a dependency on libc.  Moreover, the user has to set
LD_LIBRARY_PATH anyway to use the debug libraries; this needs to
mentioned in the package descriptions.

Sven