lsof: add license + update homepage

lib/licenses: add purdue style BSD license

lib/licenses.nix

@@ -546,6 +546,11 @@ lib.mapAttrs (n: v: v // { shortName = n; }) rec {
     fullName = "Public Domain";
   };
 
+  purdueBsd = {
+    fullName = " Purdue BSD-Style License"; # also know as lsof license
+    url = https://enterprise.dejacode.com/licenses/public/purdue-bsd;
+  };
+
   qpl = spdx {
     spdxId = "QPL-1.0";
     fullName = "Q Public License 1.0";

pkgs/development/tools/misc/lsof/default.nix

@@ -51,15 +51,16 @@ stdenv.mkDerivation rec {
     cp lsof $out/bin
   '';
 
-  meta = {
-    homepage = ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/;
+  meta = with stdenv.lib; {
+    homepage = https://people.freebsd.org/~abe/;
     description = "A tool to list open files";
     longDescription = ''
       List open files. Can show what process has opened some file,
       socket (IPv6/IPv4/UNIX local), or partition (by opening a file
       from it).
     '';
-    maintainers = [ stdenv.lib.maintainers.dezgeg ];
-    platforms = stdenv.lib.platforms.unix;
+    maintainers = [ maintainers.dezgeg ];
+    platforms = platforms.unix;
+    license = licenses.purdueBsd;
   };
 }