Update to my2pg version 1.28, add docs, update URL for newest version.

Create diff of custom changes Tom made to the utility for CREATE
FUNCTION.

This will make moving this utility out of CVS easier.

contrib/mysql/my2pg.diff

@@ -0,0 +1,112 @@
+*** /laptop/my2pg.pl	Mon Apr 19 18:51:44 2004
+--- my2pg.pl	Mon Apr 19 18:59:09 2004
+***************
+*** 38,43 ****
+--- 38,50 ----
+  # $My2pg: my2pg.pl,v 1.28 2001/12/06 19:32:20 fonin Exp $
+  # $Id: my2pg.diff,v 1.1 2004/04/19 23:18:12 momjian Exp $
+  
++ # Custom patch
++ # Revision 1.9  2002/08/22 00:01:39  tgl
++ # Add a bunch of pseudo-types to replace the behavior formerly associated
++ # with OPAQUE, as per recent pghackers discussion.  I still want to do some
++ # more work on the 'cstring' pseudo-type, but I'm going to commit the bulk
++ # of the changes now before the tree starts shifting under me ...
++ 
+  #
+  # $Log: my2pg.diff,v $
+  # Revision 1.1  2004/04/19 23:18:12  momjian
+  # Update to my2pg version 1.28, add docs, update URL for newest version.
+  #
+  # Create diff of custom changes Tom made to the utility for CREATE
+  # FUNCTION.
+  #
+  # This will make moving this utility out of CVS easier.
+  #
+  # Revision 1.28  2002/11/30 12:03:48  fonin
+***************
+*** 332,342 ****
+  	    print LIBTYPES "\n * Types for table ".uc($table_name);
+  	    print LIBTYPES "\n */\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_in (opaque)
+  	RETURNS $typename
+  	AS '$libtypename'
+  	LANGUAGE 'c'
+! 	WITH (ISCACHABLE);\n";
+  
+  # creating output function
+  	    my $func_out="
+--- 339,349 ----
+  	    print LIBTYPES "\n * Types for table ".uc($table_name);
+  	    print LIBTYPES "\n */\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_in (cstring)
+  	RETURNS $typename
+  	AS '$libtypename'
+  	LANGUAGE 'c'
+! 	WITH (ISSTRICT, ISCACHABLE);\n";
+  
+  # creating output function
+  	    my $func_out="
+***************
+*** 386,396 ****
+      return (*a>=*b);
+  }\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_out (opaque)
+! 	RETURNS opaque
+  	AS '$libtypename'
+  	LANGUAGE 'c'
+! 	WITH (ISCACHABLE);\n";
+  
+  	    $types.="\nCREATE TYPE $typename (
+  	internallength = 2,
+--- 393,403 ----
+      return (*a>=*b);
+  }\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_out ($typename)
+! 	RETURNS cstring
+  	AS '$libtypename'
+  	LANGUAGE 'c'
+! 	WITH (ISSTRICT, ISCACHABLE);\n";
+  
+  	    $types.="\nCREATE TYPE $typename (
+  	internallength = 2,
+***************
+*** 532,538 ****
+  	    print LIBTYPES "\n * Types for table ".uc($table_name);
+  	    print LIBTYPES "\n */\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_in (opaque)
+  	RETURNS $typename
+  	AS '$libtypename'
+  	LANGUAGE 'c';\n";
+--- 539,545 ----
+  	    print LIBTYPES "\n * Types for table ".uc($table_name);
+  	    print LIBTYPES "\n */\n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_in (cstring)
+  	RETURNS $typename
+  	AS '$libtypename'
+  	LANGUAGE 'c';\n";
+***************
+*** 584,591 ****
+  
+  \n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_out (opaque)
+! 	RETURNS opaque
+  	AS '$libtypename'
+  	LANGUAGE 'c';\n";
+  
+--- 591,598 ----
+  
+  \n";
+  
+! 	    $types.="\nCREATE FUNCTION $typename"."_out ($typename)
+! 	RETURNS cstring
+  	AS '$libtypename'
+  	LANGUAGE 'c';\n";
+