* Update readme.md
I noticed a spelling mistake and proceeded to look through the whole read-me file. There are actually a lot of other less grammar related mistakes I would want to change, but I tried to keep it strictly to grammar mistakes… for now. The exception is the disclaimer that **should not** be hidden away in a scroll-able code block. You can hide it at the bottom of the section, but please don't try to hide it out of view.
* Sign .clabot so I can merge this PR.
I still don't know why I need to sign this CLA when I haven't even contributed any code, but sure, I'll do it. Also, to the person reading these commit messages; hello.
* Mitigate open redirect vulnerability in login page
Current implementation won't allow full url redirection within local origin, and will allow open redirection with href like "//google.com".
Comparing redirect url's origin with current origin will ensure the two share the same protocol, hostname, and port.
* Update .clabot
Add catmandx to list of contributors for creating pull request
