In build_html(), strip off leading "./" from filename, added by
kpsewhich.  This caused a problem with the latest latex2html beta.
diff --git a/Doc/tools/mkhowto.sh b/Doc/tools/mkhowto.sh
index b85846b..e53569b 100755
--- a/Doc/tools/mkhowto.sh
+++ b/Doc/tools/mkhowto.sh
@@ -78,6 +78,7 @@
 
 build_html() {
     TEXFILE=`kpsewhich $1.tex`
+    TEXFILE="${TEXFILE#./}"
     BUILDDIR=${2:-$1}
     latex2html \
      -init_file $L2H_INIT_FILE \