more announcement targets

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43991 15284696-431f-4ddb-bdfa-cd5b030d7da7

doc/howto_release.txt

@@ -180,11 +180,13 @@ Contents
    info@harzer.de
    info@j-geoinfo.net
    editor@newsblaze.com
+   pr@geocomm.com
 
  Web:
    http://slashgeo.org/submit.pl
    http://freshmeat.net/projects/grass/?highlight=GRASS (update, MN)
    http://linuxtoday.com/contribute.php3
+   https://www.osor.eu/projects/grassgis (update, MN)
    http://www.newsforge.com/submit.pl
    http://www.macnn.com/contact/newstips/1
    http://www10.giscafe.com/submit_material/submit_options.php#Press (MN)