sage: fix meta information

Correct homagepage, description, and license.
sage: fix download url for version 6.1.1
ghc-mod 5.2.1.0 - Fix #387, Pattern match failure in GhcPkg
Merge pull request #4793 from bflyblue/master

ghc-mod 5.2.1.0 - Fix #387, Pattern match failure in GhcPkg
Merge pull request #4788 from joachifm/sage

sage fixes
Adds the hsc3-server haskell package to the tree.
nasm: Revert "update from 2.11.05 to 2.11.06"

This reverts commit bce477f8465bba5ac894e5a4fc11cf1590073675, which
breaks syslinux.