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-distutils-extra/PKGBUILD

@@ -11,8 +11,8 @@ url="https://launchpad.net/python-distutils-extra"
 makedepends=('python3-setuptools' 'python2-setuptools')
 source=("https://launchpad.net/$pkgbase/trunk/$pkgver/+download/$pkgbase-$pkgver.tar.gz"
         $pkgbase-$pkgver.tar.gz.asc::https://launchpad.net/$pkgbase/trunk/$pkgver/+download/dist-$pkgbase-$pkgver.tar.gz.asc)
-md5sums=('4e4c9bee92a3ca8bfd915f3adcf14648'
-         'SKIP')
+sha256sums=('3d100d5d3492f40b3e7a6a4500f71290bfa91e2c50dc31ba8e3ff9b5d82ca153'
+            'SKIP')
 
 package_python3-distutils-extra() {
   depends=('python>=3.3' 'intltool')