Turns out this was the full error:
```
$ osslsigncode
F:/msys64/mingw64/bin/osslsigncode.exe: error while loading shared libraries: libgsf-1-114.dll: cannot open shared object file: No such file or directory
```
osslsigncode uses libgsf for `.msi` support.
It started to fail as below in the last 24 hours:
```
C:/msys64/mingw32/bin/osslsigncode.exe: error while loading shared libraries: ?: cannot open shared object file: No such file or directory
```
* 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.
