* harbour/source/pp/hbpp.c
* accept empty $Id keywords in ChangeLog file. It allows to compile
Harbour from source taken directly from SVN as tarball without
keyword expanding, f.e. by:
http://harbour-project.svn.sourceforge.net/viewvc/
harbour-project/trunk/harbour.tar.gz?view=tar
In such case revision number is not unknown and set arbitrary to -1
* change -q parameter to accept 0, 1 and 2 levels to disable standard
messages and also warning/error ones