Lispref version info.

lispref.texi has this; ＠titlepage ＠title XEmacs Lisp Reference Manual ＠c The edition number appears in several places in this file ＠c and also in the file intro.texi. ＠c This manual documents XEmacs 19.14 and 20.0 and was based on the ＠c documentation for FSF Emacs 19.29 (v2.4). ＠subtitle Version 3.3 (for XEmacs 21.0), April 1998 and several other references to the 1998 and XEmacs 21.0. I think this info should probably be generated by the build process--perhaps inserting the last modification date of any of the relevant source files in the title page, to give people an idea of how old the data is. -- “I, for instance, am gung-ho about open source because my family is being held hostage in Rob Malda’s basement. But who fact-checks me, or Enderle, when we say something in public? No-one!” -- Danny O’Brien