[Forum Bug]Catcha Fix Address broken

[MajorLunaC]

I noticed that the captcha for forum registration has an email to ask for assistance that is invalid:
noreply@forum.minetest.net

I actually had some problems with the captcha yesterday, where even though I put in the easily-readable captcha correctly, it never accepted it. (I forgot my login at the time.)

[ExeterDad]

noreply is as it implies. This email isn't read or meant to be read by admins. For a email to be sent out a reply email address must be included. It is common a cross the internet for email that is sent automatically.

[dstromberg2]

On the registration page: "If you are visually impaired or cannot otherwise read this code please contact the Board Administrator." The email link for the "Board Administrator" does indeed point to noreply. Should either replace this with a monitored email address, or remove that link (maybe tell users to try IRC instead?)