Log Message:
New or changed in 3.70:

some code improvements as suggested by Coverity. See current Coverity status \ 
here: https://scan.coverity.com/projects/498
removed the -DBUGGYGPP compile flag since now g++ can compile the code without \ 
it. The former work-arounds are still there but will be removed later.
enabled more warnings when compiling with g++ and fixed some resulting warnings.
changed the autoconf part to better support the inclusion of libzip for the pptx \ 
driver.
included a lot of documentation corrections contributed by Peter Dyballa. Many \ 
thanks!
using non case sensitive comparison when determining the target format from the \ 
file suffix.
using more STL classes instead of older private replacements (string and \ 
vector). In this context also some hard coded limits were removed.
fixed an assertion violation when using -ssp and a closepath occurred.
added the dump of the font name for the DXF format.
prototype of a "simulate fill" option for emulating filling by \ 
stroking. This is based on fillpoly.c from the hp2xx project. Thanks also to \ 
Gary Langthorne for pointing out this option. This is still kind of \ 
experimental.