* contrib/hbrun/hbrun.prg
* contrib/hbrun/plugins.prg
* utils/hbmk2/hbmk2.prg
* synced recent changes
+ changed extension filename to <home>/.harbour/hb_extension (hb_ext.ini in MS-DOS)
envvar to HB_EXTENSION
+ plugins are now loaded from <home>/.harbour/*.hb, <home>/.harbour/*.hrb