cygwinports / glib2.0

Also, move gdb scripts to debuginfo package where they belong.

The underlying issues are fixed in Cygwin 1.7.31.

GnuCash creates reports in HTML, then (since 2.6) hands them off to a
WebKitWebView for viewing with a URI of file:///%s.  The third slash
is added for compatibility with Win32, where it represents the system
root ("My Computer") and, for the purposes of URIs, C: (or the archaic
C|) is seen as a top-level directory thereof.

On *NIX systems, the filename already includes a leading slash (e.g.
/tmp/gnc-report-RANDOM.html), so the result is four leading slashes,
the first two of which are dropped, leaving what Cygwin sees as a UNC
address.  However, this is an incorrect assumption in this case, as a
file: URI (just like other protocols) is officially of the form
file://hostname/path, with hostname being optional when referring to the
local system, hence the customary three leading slashes.  So a UNC URI
would have only two leading slashes, and anything more than three should
be treated simply as extras.

This broke GIMP plug-in menu registration:
http://article.gmane.org/gmane.os.cygwin.ports.general/1330

Not all consumers of GLib use GDBus, which does require a dbus-daemon.
We'll move this dependency up the stack instead (e.g. anything providing
a DBus service file, or anything providing an X session).

Credit to Ken Brown for tracking this down and submitting the patch.