This does 3 things:
1. Delimiters and "unwise" characters are never included in the
hostname or path.
2. url.format will sanitize string URLs that are passed to it.
3. The parsed url's 'href' member will be the sanitized url, which may
not match the argument to url.parse.
test/simple/test-url.js:31:(0110) Line too long (82 characters).
test/simple/test-url.js:39:(0110) Line too long (85 characters).
test/simple/test-url.js:40:(0110) Line too long (92 characters).
Note that "//" is still a special indicator for the hostname, and this does
not change the parsing of mailto: and other "slashless" url schemes. It
does however remove some oddness in url.parse(req.url) which is the most
common use-case for the url.parse function.
Also, make a slight change from original on url-module to put the
spacePattern into the function. On closer inspection, it turns out that the
nonlocal-var cost is higher than the compiling-a-regexp cost.
Also, documentation.