"reg_ssl_verify=0" boot parameter disables SSL checks (part of bnc#874745)
changes

- 3.1.39
use Linuxrc "ptoptions" feature for "reg_ssl_verify" boot option
reuse the already existing "regurl" parameter
registration_spec.rb share a method stub in the global "before" block
Merge pull request #57 from yast/reg_ssl_verify

Add "reg_ssl_verify" boot option support