Allow disable fencing with etcd.fencing_enabled: false

[o2gy84]

It is confused when fencing just works if setting is actually etcd.fencing_enabled: false.

[ochaton]

thx! fun staff, is that etcd.fencing_enabled can be boolean true or string "true". In ETCD every key/value is a string. Configuring etcd.boolean_auto enforces moonlibs/config to guess whether the string "true" is actually a boolean true.

To complete your fix, could you change your fix to this:

tostring(config.get('etcd.fencing_enabled')) == 'true'

this should solve every possible way of moonlibs/config boolean-guessing setup