Update manpage with license and pointers to Inform6 language documentation.

Author: DavidGriffith

inform.1

@@ -227,8 +227,24 @@ versions 1 or 2 of the Z-Machine.
 .br
 Modules cannot be used with Glulx and are deprecated for Z-Machine.
 
-.SH SEE ALSO
+.SH DOCUMENTATION
+The canonical documentation for \fBInform6\fP is the
+\fBInform_Designer's Manual\fP.  This work can be browsed at
+.br
+.RI < http://inform-fiction.org/manual/html/contents.html >
+downloaded from
+.br
+.RI < http://inform-fiction.org/manual/DM4.pdf >
+and purchased in hardcopy at
+.br
+.RI < http://amazon.com/ >
 
+Another noteworthy and somewhat more up-to-date resource is the 
+\fBInform Beginner's Guide\fP.  This work can be downloaded at
+.br
+.RI < http://inform-fiction.org/manual/download_ibg.html >
+
+.SH SEE ALSO
 .IR zcode-interpreter (6)
 and the manuals and language reference which can be found online at
 .br
@@ -244,3 +260,33 @@ Graham Nelson in 1993.
 
 This manpage was written by Jan Nordholz <[email protected]>
 for the Debian Project and altered by David Griffith <[email protected]>.
+
+.SH DISTRIBUTION
+The compiler and standard library for \fBInform6\fP are licensed under
+.IP 1)
+The traditional Inform license as described by the DM4, or
+.IP 2)
+The Artistic License 2.0 .
+
+.RE
+Here is the relevant bit from the Inform Designer's Manual, 4th edition:
+
+Copyright on Inform, the program and its source code, its example games 
+and documentation (including this book) is retained by Graham Nelson, 
+who asserts the moral right to be identified as the author under the 
+Copyrights, Designs and Patents Act 1988.  Having said this, I am happy 
+for it to be freely distributed to anybody who wants a copy, provided 
+that: (a) distributed copies are not substantially different from those 
+archived by the author, (b) this and other copyright messages are always 
+retained in full, and (c) no profit is involved.  (Exceptions to these 
+rules must be negotiated directly with the author.)  However, a story 
+file produced with the Inform compiler (and libraries) then belongs to 
+its author, and may be sold for profit if desired, provided that its 
+game banner contains the information that it was compiled by Inform, and 
+the Inform version number.
+
+The Artistic License 2.0 can be found at
+.br
+https://opensource.org/licenses/Artistic-2.0
+.br
+and the file \fBARTISTIC\fP in the \fBInform6\fP distribution archive.