Change some URLs from author dirs to dist dirs.
The example in the porter's handbook didn't have the trailing slash;
mea culpa for not having caught that when it went in.
Refer to all modules using their /dist/Foo/ path instead of via
the mishmash of old author path, new author path, module documentation,
etc. These are mostly stragglers that should have been caught in pass 2.
This pass brought to you by Bill's 102-degree fever during pass 2.
