Bump draft links to -05, and use the new directives

[joker314]

All the links were pointing to the -04 draft. However, the -05 draft has been published

Hence, update all those links. I used a regular expression matching for "-04" to do this.

In addition, make the following changes:

• Change the form for generating security.txt files so that it lists the new version of the directives
• Use more succint notation in the JavaScript
• Expand the camelCase -> directive converter to be able to handle multiple words
• Use the var keyword to ensure variables stay in their scope only

[joker314]

Oh and we need to add/remove some of the directives!

[joker314]

Okay, I've updated all the directives and the links, and also changed the JavaScript a little. It should all still work in IE9+ (as before), but I haven't tested.

I think we should add some validation (e.g., make Contact a required field, and explain to the user if they fail to complete it). I'll file an issue for it.

[EdOverflow]

Thank you very much, @joker314. It turns out you can simply link to https://tools.ietf.org/html/draft-foudil-securitytxt and the user will be redirected to the latest draft. :)

[joker314]

Thanks @EdOverflow, that's super cool, so I've updated to the special links so that we'll have less work in future.

[nightwatchcyber]

one minor issue needs to be fixed, otherwise I think this is good