title: Jenkins does not react at changes in jenkins.xml
body: <p>I have a jenkins, one part of which stored at disk D and another one (war part) stored in C:\ProgramFiles(x86)\jenkins.
  The lastest part has jenkins.xml file. It has --httpPort=8080 value as one of the arguments.
  But if I change it to 8081 or 8090 jenkins still running at 8080 port after restarting.
  Do I do smth wrong?</p>