Nothing uses this variable. blame suggests that it was used for HP-UX once upon a time. The companion variable, MOZ_POST_PROGRAM_COMMAND, is only used by HP-UX, but as we're not wholesale removing HP-UX support (yet), we should leave MOZ_POST_PROGRAM_COMMAND alone.
Noticed while doing other things.
Attachment #8720438 - Flags: review?(mshal)
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