vim-patch:7.4.1480

Problem:    Cannot add a pack direcory without loading a plugin.
Solution:   Add the :packadd command.

91715873d1

src/nvim/ex_cmds.lua

@@ -1854,6 +1854,12 @@ return {
     addr_type=ADDR_LINES,
     func='ex_print',
   },
+  {
+    command='packadd',
+    flags=bit.bor(BANG, FILE1, TRLBAR, SBOXOK, CMDWIN),
+    addr_type=ADDR_LINES,
+    func='ex_packadd',
+  },
   {
     command='pclose',
     flags=bit.bor(BANG, TRLBAR),