nss and nspr security, bug fix, and enhancement update

nspr 4.9.1-4 - Resolves: rhbz834219 - Fix postinstall scriptlet failures - Fix %post and %postun lines per packaging guidelines - Updated License: to MPLv2.0 per upstream 4.9.1-3 - Resolves: rhbz834219 - Ensure nspr-config.in changes get applied 4.9.1-2 - Resolves: rhbz834219 - restore top sectio...