fix tag name creation

Author: mahtin

Makefile

@@ -89,7 +89,7 @@ showtag: sdist
 	@ v=`ls -r dist | head -1 | sed -e 's/cloudflare-\([0-9.]*\)\.tar.*/\1/'` ; echo "\tDIST VERSION =" $$v ; (git tag | fgrep -q "$$v") && echo "\tGIT TAG EXISTS"
 
 tag: sdist
-	@ v=`ls -r dist | head -1 | sed -e 's/cloudflare-\([0-9.]*\)\.tar.*/\1/'` ; echo "\tDIST VERSION =" $$v ; (git tag | fgrep -q "$$v") || git tag "$$v"
+	@ v=`ls -r dist | head -1 | sed -e 's/cloudflare-\([0-9][0-9.][0-9]*[.rc0-9]*\)\.tar.*/\1/'` ; echo "\tDIST VERSION =" $$v ; (git tag | fgrep -q "$$v") || git tag "$$v"
 
 sign:
 	v=`ls -r dist | head -1 | sed -e 's/cloudflare-\([0-9.]*\)\.tar.*/\1/'` ; echo "\tDIST VERSION =" $$v ; \