copyright.tex: Add 1995 to copyright message.
lib.tex: add libimp; remove bogus warning about lineii.
libmath.tex: document hypot().
libmd5.tex: rename md5.md5() to md5.new().
libposix.tex: document chown().
libposixfile.tex: openfile() instead of fileopen().
libsocket.tex: document gethostbyaddr().
libtypes.tex: add footnote explaining why readline() keeps the newline.
ref3.tex: correct typos, add back*quotes to index.
ref4.tex: don't use \verb inside footnote.
ref5.tex: explain repr() and str() and add them + back*quotes to index.
ref6.tex: correct typo, don't use \verb in footnote.
ref7.tex: don't use \verb in footnote.
diff --git a/Doc/copyright.tex b/Doc/copyright.tex
index f445c40..d870d3c 100644
--- a/Doc/copyright.tex
+++ b/Doc/copyright.tex
@@ -1,5 +1,5 @@
-Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
-Amsterdam, The Netherlands.
+Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
+The Netherlands.
\begin{center}
All Rights Reserved