[SREP-1559] feat: check that when used, proxy url starts with http and do proxy hostname dns lookup to confirm connectivity#756

T0MASD wants to merge 1 commit intoopenshift:mainopenshift/backplane-cli:mainfrom

T0MASD:update_checking_request_to_backplaneT0MASD/backplane-cli:update_checking_request_to_backplaneCopy head branch name to clipboard