allow for spaces when extracting commonName from csr (fixes #423)

dehydrated

@@ -498,7 +498,7 @@ extract_altnames() {
 
   else
     # No SANs, extract CN
-    altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
+    altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN ?= ?([^ /,]*).*/\1/' )"
     echo "${altnames}"
   fi
 }