switch to sha256 checksums

* 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.

python-beaker/PKGBUILD

@@ -10,7 +10,7 @@ license=('PSF')
 url="http://beaker.groovie.org/"
 depends=("python2-setuptools" "python3-setuptools")
 source=("${pkgbase}-${pkgver}.tar.gz"::https://github.com/bbangert/beaker/archive/${pkgver}.tar.gz)
-md5sums=('0a0d4933b28236cc339588871314df74')
+sha256sums=('dad9a94e694f4a08fcf298c7c12c07942585a2de076a860d86f4e5ca9603e336')
 
 prepare() {
   cd "${srcdir}"