Create sign-server-req

This explicitly adds the nsCertType = server to the certificate.
Fix file mode for sign-server-req script

Signed-off-by: Josh Cepek <josh.cepek@usa.net>
Merge pull req #13 for sign-server-req support

This merge-commit enables the 2.x series to be used as a CA able to
accept CSRs from a prospective server. The sign-server-req frontend
issues a certificate with server attributes.

Original-Author: Marc Isaacson <marc@isaacsonwebdevelopment.com>
Signed-off-by: Josh Cepek <josh.cepek@usa.net>