BUG/MAJOR: mworker: fix infinite loop on master with no proxies.

The master is re-exec with an empty proxies list if no master CLI is
configured.

This results in infinite loop since last patch:
3b68b602 ("BUG/MAJOR: log-forward: Fix log-forward proxies not fully initialized")

This patch avoid to loop again on log-forward proxies list if empty.

This patch should be backported until v2.3
1 file changed