* upgrade some broken packages
* correct some broken urls/checksums
* use secure urls where possible
* update PKGBUILD templates
* remove line-ending whitespace
* minor typos/fixes
Remaining md5sums either didn't download or
didn't pass checksum tests.
There is no "nuitka2" package installed by this build, and the
search-and-replace was breaking logic and screwing up the #! line too.
Ripping it out seems fine, and makes it consistent with the py3 package.
ClosesAlexpux/MINGW-packages#788.
