Bump version numbers.

Doc/Makefile

@@ -66,7 +66,7 @@ TOOLSDIR=	tools
 
 # This is the *documentation* release, and is used to construct the file
 # names of the downloadable tarballs.
-RELEASE=2.3b2
+RELEASE=2.3c1
 
 PYTHON=	   python
 DVIPS=	   dvips -N0 -t $(PAPER)

Doc/texinputs/boilerplate.tex

@@ -7,5 +7,5 @@
 
 \date{\today}			% XXX update before final release!
 \release{2.3}			% software release, not documentation
-\setreleaseinfo{b2+}		% empty for final release
+\setreleaseinfo{c1}		% empty for final release
 \setshortversion{2.3}		% major.minor only for software