Revert "Remove printfs"

This reverts commit 634741ddf4e9fdca94f0d6480e309a18c9f6b4be.
Revert "Fix race condition in quorum.go"

This reverts commit 99257803621867aa576a51bc722b7f3257757adb.
Revert "Redo comm package"

This reverts commit 1d6e1f437716ee74a7d64df0445c9cadf2eea534.