doersl.cls : update comments
oorexxshell : workaround to avoid crash under Linux
It seems there is a problem when rxapi is not started.
Crash of the interpreteur... Probably in the routine readline.
Under Linux, use /tmp/ooRexx.pid to let a normal user launch rxapi.
When using /var/run/ooRexx.pid, must be root to be able to launch rxapi.