slix and ronshapiro Change HostAndPort equals() and hashCode() to stop depending on wheth…
…er brackets were included

Now they depend only on host and port.

Useful for storing IPv6 addresses in Set and Map

RELNOTES=`net.HostAndPort`: Changed equals() and hashCode() to stop depending on whether brackets were included. Now they depend only on host and port.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=204509648
Latest commit 34c1616 Jul 13, 2018