Similar to https://github.com/Alexpux/MINGW-packages/pull/2878
this adjusts the pkgbase names of all packages to match the directory
name the PKGBUILD is in.
The motivation for this is to provide links to PKGBUILD sources and
git history from the web interface.
The "dwz" directory is deleted as it just contains an older copy of the
elfutils PKGBUILD (elfutils isn't in the repo)
* 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.
