char-ready? => read-char-ready?

[cph@kleph.AI.MIT.EDU (Chris Hanson)]

   Date: Tue, 14 Jun 88 22:21:30 EST
   From: R. Kent Dybvig <dyb@iuvax.cs.indiana.edu>

   I proposed this a while back, but my proposal met with little or no
   response.  I propose that the name of the optional procedure
   "char-ready?" be changed to "read-char-ready?", to allow for
   generalization to "read-ready?", "write-char-ready?", and maybe even
   "write-ready?".

I don't know about the other three, but I agree with your proposal to
rename `char-ready?'.  I should have seconded this proposal the last
time -- we blew it when we originally named that procedure.