tomcat: update from 6.0.39 to 6.0.44

potentially fixes CVE-2014-0227, CVE-2014-0119, CVE-2014-0099, CVE-2014-0096, CVE-2014-0075

pkgs/servers/http/tomcat/6.0.nix

···
 import ./recent.nix 
   {
     versionMajor = "6";
-    versionMinor = "0.39";
-    sha256 = "19qix6affhc252n03smjf482drg3nxd27shni1gvhphgj3zfmgfy";
+    versionMinor = "0.44";
+    sha256 = "0942f0ss6w9k23xg94nir2dbbkqrqp5k628jflk51ikm5qr95dxa";
   }