Improve election reliability.
Improve election reliability.

Hoverbear/raft,Hoverbear/raft,danburkert/raft,posix4e/raft,tschottdorf/raft,frewsxcv/raft-rs,placrosse/raft,danburkert/raft,achanda/raft,frewsxcv/raft-rs,pwoolcoc/raft,tempbottle/raft-1,tschottdorf/raft,jamwt/raft