Clarify the potentially destructive nature of changing your site address from General Settings

[johnbillion]

On the General Settings screen we have two nice big fields for changing your WordPress Address and Site Address. If you don't know what you're doing then changing these values can kill your site.

We should do one or both of the following:

• Add some text about moving your site and a link to ​http://codex.wordpress.org/Moving_WordPress below the address fields.
• Add an AYS when a user changes the value of either of these fields.

There could be a JavaScript AYS along the lines of "Are you sure you want to change your site address? Make sure you know what you're doing first, etc" or there could be a server-side AYS using wp_die() with a "Yes I know what I'm doing" confirmation button.

Thoughts?

[SergeyBiryukov]

Related/duplicate: #18769, #10970

[nacin]

We are introducing a constant to handle multisite-in-a-subdirectory in #19796. I haven't done final reviews on that yet because I want to see how we can use a constant, probably the same one, here.

If home == siteurl, we should just hide the siteurl field. home should possibly stay but only to be able to change domains, add/remove www, etc. We should add some validation as discussed in #10970 and elsewhere. (See dd32's plugin.)

If home != siteurl, then we give them the UI. Unless it is constant-controlled (new way) in which case, no UI.

Beyond that, this is essentially a duplicate of #10970. Shall we close this and move that to 3.5?

[johnbillion]

Replying to nacin:

Beyond that, this is essentially a duplicate of #10970. Shall we close this and move that to 3.5?

Agreed.