Updates cmb, new features and bug fix

- fix a bug in the accounts listing
- adds proxy support
- adds ssl checks :
   - checks the certificate chain with the Verisign authority
   - checks that the sha256sum of the server's certificate is what's expected (like in Browser).
   - adds an option to avoid ssl checks (useful for debug)

Signed-off-by: Johann Broudin <Johann.Broudin@6-8.fr>
Signed-off-by: Romain Bignon <romain@symlink.me>