Stop maintaining the buildno file.
Also, stop determining Unicode sizes with PyString_GET_SIZE.
diff --git a/configure.in b/configure.in
index 8f7dd8c..16368a7 100644
--- a/configure.in
+++ b/configure.in
@@ -618,6 +618,9 @@
 AC_SUBST(AR)
 AC_CHECK_PROGS(AR, ar aal, ar)
 
+AC_SUBST(SVNVERSION)
+AC_CHECK_PROGS(SVNVERSION, svnversion, [echo no svnversion])
+
 case $MACHDEP in
 bsdos*|hp*|HP*)
 	# install -d does not work on BSDI or HP-UX