inhibit-splash-screen and initial-scratch-message docstrings.

[Luc Teirlinck]

I propose the following doc changes to prevent possible confusion.
I can install if desired.

===File ~/startup-diff======================================
*** startup.el  21 Jan 2006 09:10:12 -0600      1.396
--- startup.el  21 Jan 2006 16:45:09 -0600      
***************
*** 41,47 ****
    :group 'internal)
  
  (defcustom inhibit-splash-screen nil
!   "*Non-nil inhibits the startup screen.
  This is for use in your personal init file, once you are familiar
  with the contents of the startup screen."
    :type 'boolean
--- 41,49 ----
    :group 'internal)
  
  (defcustom inhibit-splash-screen nil
!   "Non-nil inhibits the startup screen.
! It also inhibits display of the initial message in the *scratch* buffer.
! 
  This is for use in your personal init file, once you are familiar
  with the contents of the startup screen."
    :type 'boolean
***************
*** 1087,1093 ****
  
  ")
    "Initial message displayed in *scratch* buffer at startup.
! If this is nil, no message will be displayed."
    :type '(choice (text :tag "Message")
                 (const :tag "none" nil))
    :group 'initialization)
--- 1089,1097 ----
  
  ")
    "Initial message displayed in *scratch* buffer at startup.
! If this is nil, no message will be displayed.
! If `inhibit-splash-screen' is non-nil, then no message is displayed,
! regardless of the value of this variable."
    :type '(choice (text :tag "Message")
                 (const :tag "none" nil))
    :group 'initialization)
============================================================