redhat: bump version in specfile to 2.2.1
redhat: add "make" to BuildRequires list
redhat: refresh freeradius-cert-config.patch
redhat: README was renamed to README.rst
redhat: removed obsolete patches
redhat: package everything in freeradius rpm
redhat: only keep the last changelog from original spec file
redhat: package all modules in freeradius RPM
Merge pull request #286 from fajarnugraha/v2.x.x-redhat-20130509

Fix redhat package to build and run cleanly for current v2.x.x branch