* src/compiler/hbmain.c
* src/compiler/cmdcheck.c
* src/compiler/hbcomp.c
* src/compiler/hbusage.c
* include/hbcompdf.h
+ Added support for -i- and -i+ options. They will disable/enable
handling of INCLUDE envvar.
* config/rules.mk
+ Added -i- Harbour compiler switch to avoid any interference
with user set INCLUDE envvars.