A number of install scripts were testing for install-info to no effect,
then calling it regardless. For minimal installs, this makes pacman fail
on them visibly.
This fix replicates what other MSYS2 packages, e.g. autoconf, do.
Also none of these packages actually depend on GNU info.
mpfr package had invalid version 3.1.4.-3 when it should have been
3.1.4-3. This was caused because an empty _patchlevel was set appended
to the package version separated with a dot.
This commit changes the package versioning so that the _patchlevel is
appended to the package version only if it isn't empty.
Similar commit 0c86b53 was done to mpfr package in MINGW-packages.
* upgrade some broken packages
* correct some broken urls/checksums
* use secure urls where possible
* use stable url for ncurses
* some whitespace fixes
Remaining md5sums either didn't download or
didn't pass checksum tests.
