remove duplicate documentation about uninstall option
Note that -L doesn't work with perl with standard modules stipped (e.g. RHEL, Fedora)
Display deprecation warnings for --perl
typo
bump EUMM and M::B to the versions that support MYMETA.json #323
Trivial typo.
HPUX 11.11 does not support -z flag to tar

HPUX 11.11 (and others?) need to use gzip to manage compressed tar (tgz) files, as their version of tar does not support -z.
Merge multiple constants into a single one

SUNOS and HPUX are only used to identify if tar is bad on that platform.  WIN32 is also used elsewhere.  Identify platforms with a known bad tar program in a single location.
cleanup
update suggestions for bad behaving cpan modules to reflect usage of PERL_MM_USE_DEFAULT
ignore .pm files PAUSE ignores (such as ones in x?t/)
Mask passwords when we fail to download a module
Update test case for masking passwords if mirror fails
don't find directories when searching for executables
only assume Module::Build configure prereq if no configure prereqs specified

If there are configure prereqs specified, assume they are accurate
instead of always adding Module::Build when a Build.PL exists.
return true when skipping archive verification. Fix #402