* include/hbextudd.ch
* include/hbextsca.ch
* include/hbextern.ch
* config/postinst.hbs
! Fixed to exclude HB_GT_ symbols, put HBSYMBOL to hbextsca.ch,
put USRRDD_* to hbextudd.ch.
; NOTE: May I ask to review the new headers compared to old
one to see what else have to be filtered out or moved
to different header?