[TCLCORE] TLS 1.4 release imminent - sanity check

[Jeffrey H. <jef...@aj...>]

I'm preparing to make a 1.4 release of TLS.  One big change is that
TLS will no longer compile against Tcl 8.0-8.1.  I've added the
following to the README.txt:

  The TLS 1.4 release requires Tcl 8.2.0+, with 8.3.2+ preferred.  The
  stacked channel implementation in Tcl was originally introduced in 8.2.0
  (previously the Trf patch) and rewritten for 8.3.2+ due to inherent
  limitations in the earlier implementation.  TLS 1.4 should compile with
  any stubs-capable Tcl interpreter, but will require 8.2+ when loaded.
  There are known limitations in the 8.2.0-8.3.1 stacked channel
  implementation, so it is encouraged that people use TLS 1.4+ with an
  8.3.2+ Tcl interpreter.

I've added runtime checking of the channel version (thanks for the
code tips Andreas) to allow it to run in any 8.2.0+ Tcl interpreter.
I didn't try to support 8.0-8.1 because we know those have the same
limitations in the stacked channel implementation.  If people are
comfortable with using those, then TLS 1.3 has all the same
functionality.  TLS 1.4 is really meant for use with 8.3.2+, but
I added in 8.2.0-8.3.1 because you could make the runtime changes
work, and this allows people to compile with 8.2+ and have it work
with any 8.2+ interpreter (the test suites will crash if you use a
pre-8.3.2 interp though).  I've tested the last bits on Solaris and
NT with 8.2.0 and 8.3.2.

I've dist'ed the current CVS, so you can grab the current sources by
checking out the 'tls' module from the head.  If there aren't any
problems reported soon, I'll be tagging this tls-1-4 and making a
release.

I was considering making some binary distributions using openssl, but
apparently that would have restrictions because we compile a version
that has patented stuff that couldn't be redistributed...  Oh well, I
hear that after Sep. 20th things will loosen up on that front.

Jeffrey Hobbs                     Tcl Ambassador
ho...@Aj...          Ajuba Solutions (née Scriptics)

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