Aka skip virtual, public and foreign folders from the list of
folders to listen on, which is not allowed by the server anyway.

This doesn't work for 32-bit compilation, rather use G_GINT64_FORMAT
and cast the argument into gint64.

That way the Camel provider can return proper error code when
the destination server is unavailable.

It could happen that the child sources were disabled, but when they
were claimed again they were not enabled, which made them hidden
for a user.

The former calls the later internally, but apart of it it does few
useful things too, like removing the disk file, thus it is not
used the next start again.

It could place locale files into $PREFIX/locale, instead of $PREFIX/share/locale.
The change follows bug 703732.

(cherry picked from commit 91bc2605)

Related to: https://bugzilla.gnome.org/show_bug.cgi?id=746513

libsoup 2.48.1 doesn't call the got-body signal on failed authentication,
thus use the got-headers, which is more appropriate anyway.

Once an error happens in the streaming, cancel any pending operations
instead of keeping sending bogus requests over and over again to the
server.

(cherry picked from commit 472064f8)