This release includes the following features and fixes:
Netmasks that contain 1-bits after 0-bits (the 1-bits are not contiguous on
the left side, e.g. 255.0.255.255) are no longer accepted. They are invalid
according to RFC 4632. Netmasks are used in the -rpcallowip and -whitelist
configuration options and in the setban RPC.