* harbour/source/compiler/hbusage.c
! fixed the /u+ description - it does not work like #include.
Only preprocessor command are significant in files included
by -u<file> and -u+<file>
* harbour/doc/man/harbour.1
+ add -u+<file> description
* harbour/source/pp/ppcore.c
! fixed typo in error message table (missing ',')
* harbour/source/compiler/cmdcheck.c
* generate error when -u+ is used without <file>
* harbour/source/compiler/hbmain.c
* do not display usage screen if other errors were generated before