C/Makefile.PL - Apply Cygwin-specific fix (PLICEASE@cpan.org). (Ticket #92144)

Also add ::Filters to list of know Inline extensions (rurban).
Update
C/C.pm - fix make -jn test, parallel tests (Ticket #85336) (rurban)

Also disable BUILD_NOISY redirects on MSWin32 with cmd.exe (rurban)
 and
print exitcode with failed commands and MAKE* ENV values (rurban).
Inline/Changes - update
Inline.pm - changes to flock() calls (rurban)

Import Fcntl constants for flock and flock only on supported platforms
(would die on VMS,riscos,VOS).
Makefile.PL - simplify 5.6 PREREQ_PM handling (rurban).