BUG/MINOR: mworker: do not export HAPROXY_MWORKER_REEXEC across programs

This undocumented variable is only for internal use, and its sole
presence affects the process' behavior, as shown in bug #1324. It must
not be exported to workers, external checks, nor programs. Let's unset
it before forking programs and workers.

This should be backported as far as 1.8. The worker code might differ
a bit before 2.5 due to the recent removal of multi-process support.
2 files changed