vim-plugins: use https for github repositories

pkgs/misc/vim-plugins/vim-utils.nix

@@ -254,7 +254,7 @@ let
           let &rtp.=(empty(&rtp)?"":',').c.plugin_root_dir.'/vim-addon-manager'
           if !isdirectory(c.plugin_root_dir.'/vim-addon-manager/autoload')
             " checkout VAM
-            execute '!git clone --depth=1 git://github.com/MarcWeber/vim-addon-manager '
+            execute '!git clone --depth=1 https://github.com/MarcWeber/vim-addon-manager '
                 \       shellescape(c.plugin_root_dir.'/vim-addon-manager', 1)
           endif
         endif

pkgs/misc/vim-plugins/vim2nix/autoload/nix.vim

@@ -134,10 +134,10 @@ fun! nix#AddNixDerivation(opts, cache, name, ...) abort
     if len(list) > 0
       if '' != list[2]
         let name = list[2]
-        let repository = { 'type': 'git', 'owner': list[1], 'repo': list[2], 'url': 'git://github.com/'.list[1].'/'.list[2] }
+        let repository = { 'type': 'git', 'owner': list[1], 'repo': list[2], 'url': 'https://github.com/'.list[1].'/'.list[2] }
       else
         let name = list[1]
-        let repository = { 'type': 'git', 'owner': list[1], 'repo': 'vim-addon-'.list[1], 'url': 'git://github.com/'.list[1].'/vim-addon-'.list[1] }
+        let repository = { 'type': 'git', 'owner': list[1], 'repo': 'vim-addon-'.list[1], 'url': 'https://github.com/'.list[1].'/vim-addon-'.list[1] }
       endif
     else
       let repository = get(g:vim_addon_manager.plugin_sources, a:name, {})