tailcfg: bump map request version for v6 + default routes.
// 5: 2020-10-19, implies IncludeIPv6, delta Peers/UserProfiles, supports MagicDNS
// 6: 2020-12-07: means MapResponse.PacketFilter nil means unchanged
// 7: 2020-12-15: FilterRule.SrcIPs accepts CIDRs+ranges, doesn't warn about 0.0.0.0/::
-// 8: 2020-12-19: client can receive IPv6 addresses and routes if beta enabled server-side
+// 8: 2020-12-19: client can buggily receive IPv6 addresses and routes if beta enabled server-side
// 9: 2020-12-30: client doesn't auto-add implicit search domains from peers; only DNSConfig.Domains
// 10: 2021-01-17: client understands MapResponse.PeerSeenChange
-const CurrentMapRequestVersion = 10
+// 11: 2021-03-03: client understands IPv6 and multiple nodes with default routes
+const CurrentMapRequestVersion = 11
type StableID string
