Support Custom URL strings

[brokoler]

Hello,

I'm trying to use the estclient for certificate enrollment together with an Aruba Clearpass server, which also provides an EST URL.

After installing the estclient successfully, I downloaded all required server certificates to my linux host and tried to enroll a certificate. Since the Clearpass URL doesn't listen on https://<EST-SERVER-IP-ADDRESS>/.well-known/est/simpleenroll but instead listens to https://<EST-SERVER-IP-ADDRESS>/.well-known/est/ca:<NUMBER> it's not possible to enroll a certificate.

The estclient only expects the server IP address and the listening port and appends the string /.well-known-est-simpleenroll automatically, so no custom paths are supported.

Feature request:

• Allow full URL strings for parameter -server