use "is_update_repo" flag for finding update repositories
Merge pull request #58 from yast/update_repo

use "is_update_repo" flag for finding update repositories
"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
get details about SSL verification error, optionally import the failed certificate
start import certificate dialog
initial certificate import dialog
better helps
translator comments
fixed forgotten testing URL
display the import dialog only for self-signed certificate errors
translate openSSL error messages
show also SHA256 fingerprint