Polish the rename script

Also replace occurences of "Example" with a capital E, and play nice
with accronym names:

   ./rename-vmod-script aweaome
   # renames the module to libvmod-awesome
   # replaces Example by Awesome

   ./rename-vmod-script WTF
   # renames the module to libvmod-wtf
   # replaces Example by WTF

rename-vmod-script

@@ -14,24 +14,31 @@ NAME=$1
 if [ -z "$NAME" ]; then
 	echo "Usage: $0 <new-vmod-name-without-libvmod-prefix>"
 	echo "Rename libvmod-example source tree."
+	echo "If the name is an acronym, you can use capital letters."
 	echo
 	exit -1
 fi
 
+SYM_NAME=${NAME,,*}
+CAP_NAME=${NAME^?}
+
 if ! git diff-index --quiet HEAD --; then
 	echo "ERROR: Need a clean working tree. Run \"git stash\" first."
 	exit -2
 fi
 
-git mv src/vmod_example.c src/vmod_${NAME}.c
-git mv src/vmod_example.vcc src/vmod_${NAME}.vcc
-git mv vmod-example.spec vmod-${NAME}.spec
+git mv src/vmod_example.c src/vmod_${SYM_NAME}.c
+git mv src/vmod_example.vcc src/vmod_${SYM_NAME}.vcc
+git mv vmod-example.spec vmod-${SYM_NAME}.spec
 
-git grep -z -l example | xargs -0 sed -i -s -e "s/example/${NAME}/g"
+git grep -z -l example | xargs -0 sed -i -s -e "s/example/${SYM_NAME}/g"
+git grep -z -l Example | xargs -0 sed -i -s -e "s/Example/${CAP_NAME}/g"
 
 git rm -f rename-vmod-script
 
-echo "All done."
-echo -e "For your cut&paste needs:\n  git commit -a -m \"Automatic rename of libvmod-example to libvmod-${NAME}.\""
-
+cat <<EOF
+All done.
 
+For your cut&paste needs:
+git commit -a -m "Automatic rename of libvmod-example to libvmod-${SYM_NAME}."
+EOF