We now use this to set certain options, if supported by the compilers
(C/C++). Currently we enable various options, like
-Wno-format-truncation. We use this to ignore complaints about
possibly truncations due to the use of the snprintf() family of
functions - where forced truncation is the whole point.
Remove a pile of old SGML stuff we no longer need in dtdocbook since
we use NSGMLS.
Use some TCL macros from m4/tcl.m4 to loacate and use information in
the tclConfig.sh script installed with TCL. I had to modify it to
export TCL_INCLUDE_SPEC, which was present but not imported.
Jon Trulson