extra parens cause the links to be incorrectly formatted
and inconsistent with the rest of the document.
Signed-off-by: Ryan Beck-Buysse <rbuysse@gmail.com>
Closes#7097
Makes it easier to browse on github etc. Offers (better) links.
It should be noted that this document is already mostly outdated and
"Everything curl" at https://ec.haxx.se/ is a better resource and
tutorial.
Closes#5981
