Add deprecation notices to modules deprecated since 2000.

Doc/lib/libgopherlib.tex

@@ -4,6 +4,9 @@
 \declaremodule{standard}{gopherlib}
 \modulesynopsis{Gopher protocol client (requires sockets).}
 
+\deprecated{2.5}{The \code{gopher} protocol is not in active use
+                 anymore.}
+
 \indexii{Gopher}{protocol}
 
 This module provides a minimal implementation of client side of the

Doc/lib/librgbimg.tex

@@ -5,6 +5,8 @@
 \modulesynopsis{Read and write image files in ``SGI RGB'' format (the module
                 is \emph{not} SGI specific though!).}
 
+\deprecated{2.5}{This module is not maintained anymore and seems to be
+                 unused.}
 
 The \module{rgbimg} module allows Python programs to access SGI imglib image
 files (also known as \file{.rgb} files).  The module is far from
@@ -47,6 +49,6 @@ These are the formats returned by \function{gl.lrectread()}.
 \begin{funcdesc}{ttob}{flag}
 This function sets a global flag which defines whether the scan lines
 of the image are read or written from bottom to top (flag is zero,
-compatible with SGI GL) or from top to bottom(flag is one,
+compatible with SGI GL) or from top to bottom (flag is one,
 compatible with X).  The default is zero.
 \end{funcdesc}