added max_minions to valid config opts with default of 0 (unlimited)
added simple log msg to master for testing
its self.opts, not opts
check length of ckminions.connected_ids() against max_minions
add check for 'full' in masters tune_in return to jump to next master if necessary
return ret='full' is master has reached its maximum number of minions
for now, exit if master is full
- treat max_minions=0 as unlimited
- check if connectings minion is already connect. if already connected, always allow
if master if of type list, check if master_type is set, else start MultiMinion
add check for master_type=failover

master_type=failover expects master to be of type list, check and loop through
the available master until we can successfully log on to a master or a master
has cached the minions key
missing 's' in max_minions variable
added max_minions setting
reworked master_type section

added master being a list of servers

added master_type: failover
add missing 's'
make log message more explanatory
error out cleanly if no master could be reached in failover mode
handle that a master is full in single master mode
remove log msg, its msg gets logged in the minion authentication call
Merge remote-tracking branch 'upstream/develop' into minion_failover_master

Conflicts:
	doc/ref/configuration/master.rst
Fix docs so they will format correctly
Fix condition, avoid deprecation warning.

Find returns -1 if string not found which results in True.