MINOR: tools: make url2ipv4 return the exact number of bytes parsed

The function's return value is currently used as a boolean but we'll
need it to return the number of bytes parsed. Right now it returns
it minus one, unless the last char doesn't match what is permitted.
Let's update this to make it more usable.

(cherry picked from commit 12e1027aa6c7687b5638c0c9260696266c9e400b)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed