XLFD support was removed in commit 269f91cd (#i110171) except for parsing
fonts.dir and fonts.alias. I don't think this makes much sense in
fontconfig era, and dropping it simplifies the font manager a bit (I
don't even think we use server fonts at all).

set symbol for builtin name using rangelist

... so that the massive number of the JDBC driver's calls to JNI Attach/Detach-
CurrentThread are guaranteed not to happen on the main thread (where they are
extremely expensive, see
<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6978641> "Fix for 6929067
introduces additional overhead in thread creation/termination paths").

Only redirect to valgrind.log if --valgrind but not $VALGRIND is given.

Cherry-picked from libreoffice-3-5 branch, probably a bit more helpful fail
message.

the idea behind this concept:
* have a file containing some test data
* import file without UI
* export file to svg through XStorable::storeToURL
* compare exported svg file to a reference file and complain if they
* differ

advantages:
* easy to create test cases, even for non coders
* no special handling of sd internal code needed
* svg is showing differences in the representation and not in the model
* external programs that can be used to check the output
* can be used for all input formats

disadvantages:
* changes to svg filter code might break test cases while the change is
correct
* slow test, import + export
* might need external program for xml diff

Also, removed unnecessary reloading of the whole table data when
reference is updated.

For efficiency reasons.  Otherwise, refreshing n tables individually
would require reloading the same data cache n times.

With this change, ScDPCacheTable should never clear pointer to the
data cache instance; it should keep the same data cache instance that
it is instantiated with.