bug#1542: link emacs functions in Info

[jidanni]

I was reading e.g., (info "(gnus)RSS"):
`nnrss-use-local'
     If you set `nnrss-use-local' to `t', `nnrss' will read the feeds
     from local files in `nnrss-directory'.  You can use the command
     `nnrss-generate-download-script' to generate a download script
     using `wget'.

And to learn more about nnrss-generate-download-script, I have to
place the cursor on it, and do C-h f.

I wish I could just TAB to it and hit RET.

Or maybe that would be a special case of using emacs when reading about emacs.