web/server: disable address reuse option for BaseHTTPServer on windows
On windows, a socket with the SO_REUSEADDR option set is able to bind to
any port, even if there's already an active socket listening on it.
test-http: check server address cannot be reused.
#!/bin/sh
mkdir a
cd a
hg init
echo a > a
hg add a
hg commit -m test -d '0 0'
# Default operation
hg clone . ../b
cd ../b
cat a
hg verify
# No update
hg clone -U . ../c
cd ../c
cat a 2>/dev/null || echo "a not present"
hg verify
# Default destination
mkdir ../d
cd ../d
hg clone ../a
cd a
hg cat a