Mozilla SpiderMonkey (1.8.5) dependency link is not working.

[atultherajput]

Expected Behavior

Mozilla SpiderMonkey (1.8.5) dependency link in (src/install/unix.rst) should point to its documentation.

Current Behavior

But currently it is pointing to "404 page not found".

Possible Solution

Instead of this "https://www.mozilla.org/en-US/js/spidermonkey/" it sholud point to "https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey".

Steps to Reproduce (for bugs)

1. Goto "src/install/unix.rst"
2. Try to open Mozilla SpiderMonkey (1.8.5) from dependencies section.
3. Will get 404 Page not Found error.

Context

I was trying to find about dependencies of couchdb.

Your Environment

• Version used: 2.1.1
• Browser Name and version: Google Chrome 63.0.3239.132
• Operating System and version (desktop or mobile): Windows 10