[IPVS]: Reverse valid ip_vs_ftp ports fix: port check approach

This patch reverses 3f5af5b353ca36aca4f8a46e3da2172f669dbbbc as
a better fix was suggested by Patrick McHardy.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed