curl:
 * bump version to [http://curl.haxx.se/changes.html#7_37_0 7.37.0]
 * (temporarily) drop support for curl linked against PolarSSL, the new version requires PolarSSL-1.3.x


git-svn-id: file:///var/svn/freetz/trunk@12059 149334a1-2f27-0410-a3b9-fc62619ac1e6