NewPortManager creates new PortManager.

FlagMask is a bit mask for BitFlags.

LoadBalancedFlag represents Flags.LoadBalanced.

MostRecentFlag represents Flags.MostRecent.

MultiBindFlagMask contains the flags that allow binding the same tuple multiple times.

TupleOnlyFlag represents Flags.TupleOnly.

FlagCounter counts how many references each flag combination has.

Flags represents the type of port reservation.

PortManager manages allocating, reserving and releasing ports.

Reservation describes a port reservation.

BitFlags is a bitset representation of Flags.

PortTester indicates whether the passed in port is suitable.