title: TeamCity server url from build script
body: <p>I heed to use TC API from build script (gradle). I can read user name and password, from project properties, but I have to read serverUrl as well. But I did not find property <code>teamcity.serverUrl</code> described in doc (<a href="https://confluence.jetbrains.com/display/TCD10/REST+API#RESTAPI-RESTAuthentication" rel="nofollow noreferrer">right there</a>)</p>
  
  <p>May be this property is missed only on our build TC server?</p>