OpenBSD/ports QHTDwUKdevel/libelf Makefile, editors/neovim Makefile

   editors/neovim: backport arbitrary code execution fix to 6.4-stable.

   Source command doesn't check for the sandbox.
   https://github.com/neovim/neovim/pull/10082

   Detailed description:
   https://github.com/numirias/security/blob/master/doc/2019-06-04_ace-vim-neovim.md

   I also had to add another MASTER_SITE to libelf to get this to build.
   Seems they have re-rolled their distfile at some point.

   Reads OK, sthen@
VersionDeltaFile
1.13.4.1+3-2devel/libelf/Makefile
1.11.2.1+2-2editors/neovim/Makefile
1.1.4.1+1-1editors/neovim/patches/patch-src_nvim_getchar_c
+6-53 files

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