bug#1058: 23.0.60; emacs --daemon should not return until socket is ready

[Dan Nicolaescu]

Romain Francoise <romain@orebokech.com> writes:

  > Dan Nicolaescu <dann@ics.uci.edu> writes:
  > 
  > > Here's a version based on your code that also moves detaching from the
  > > terminal later.
  > 
  > Hmm, but the initial frame doesn't get created anyway because

Not sure why you mention that.

  > `is_daemon' is still set early like before, so it doesn't really
  > change much.  I'm unsure which problems this patch addresses.

It moves detaching from the terminal to later, so if emacs ever gets to
use stdout/stdin durin startup, it will just work (hopefully).