PR 1654/testing
* psx13/test.c, psx13/psx13.scn: Test case to improve testing of
dup2 routine.
* psxfile01/test.c, psxfile01/psxfile01.scn: New test to improve
testing of fcntl routine.
* psximfs01/init.c, psximfs01/psximfs01.scn: Improve testing of
imfs routines.
* psximfs02/init.c, psximfs02/psximfs02.scn: Improve coverage of
imfs routines.
* psxpasswd02/init.c, psxpasswd02/psxpasswd02.scn: New tests to
improve coverage of getpwent.c.
PR 1642/testing
* psximfs02/init.c, psximfs02/psximfs02.scn,
psximfs02/psximfs02.doc: Added test cases to exercise chmod(),
chown() and routines in imfs_debug.c.
