Troubleshoot info about SSH ControlMaster
Troubleshoot info about SSH ControlMaster

Relates: #4180

milleruk/composer,erasys/composer,fabiang/composer,slbmeh/composer,naderman/composer,stof/composer,JBleijenberg/composer,localheinz/composer,floverdevel/composer,phansys/composer,andrerom/composer,johnstevenson/composer,Soullivaneuh/composer,nicolas-grekas/composer,stefangr/composer,balbuf/composer,vdm-io/composer,hirak/composer,fabpot/composer,dzuelke/composer,jreinke/composer,alcohol/composer,pierredup/composer,till/composer,yaman-jain/composer,davidolrik/composer,gencer/composer,remicollet/composer,curry684/composer,staabm/composer,composer/composer,SpacePossum/composer,MoT3rror/composer