Try to make our PGP signing more useful:

* All the PuTTY tools for Windows and Unix now contain the fingerprints of
   the Master Keys. The method for accessing them is crude but universal:
   a new "-pgpfp" command-line option. (Except Unix PuTTYgen, which takes
   "--pgpfp" just to be awkward.)

 * Move the key policy discussion from putty-website/keys.html to
   putty/doc/pgpkeys.but, and autogenerate the former from the latter.
   Also tweak the text somewhat and include the fingerprints of the
   Master Keys themselves.
   (I've merged the existing autogeneration scripts into a single new
   one; I've left the old scripts and keys.html around until such time
   as the webmonster reviews the changes and plumbs in the new script;
   he should remove the old files then.)

[originally from svn r5524]
[this svn revision also touched putty-website]

cmdgen.c

@@ -313,7 +313,11 @@ int main(int argc, char **argv)
 			} else if (!strcmp(opt, "-version")) {
 			    showversion();
 			    nogo = TRUE;
-			}
+			} else if (!strcmp(opt, "-pgpfp")) {
+                            /* support "-pgpfp" for consistency with others */
+                            pgp_fingerprints();
+                            nogo = TRUE;
+                        }
 			/*
 			 * A sample option requiring an argument:
 			 *