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* make it clear that we don't use it by default (yet)
* focus on what the user cares about

Co-authored-by: Peter Rabbitson <ribasushi@protocol.ai>

Hot on the heels of 0.5.0 is 0.5.1 with some important but small bug fixes. This release:

1. Removes the 1 minute timeout for IPNS publishes (fixes #7244).
2. Backport a DHT fix to reduce CPU usage for canceled requests.
3. Fixes some timer leaks in the QUIC transport ([ipfs/go-ipfs#2515](https://github.com/lucas-clemente/quic-go/issues/2515)).

Full changelog:

- github.com/ipfs/go-ipfs:
  - IPNS timeout patch from master ([ipfs/go-ipfs#7276](https://github.com/ipfs/go-ipfs/pull/7276))
- github.com/libp2p/go-libp2p-core (v0.5.2 -> v0.5.3):
  - feat: add a function to tell if a context subscribes to query events ([libp2p/go-libp2p-core#147](https://github.com/libp2p/go-libp2p-core/pull/147))
- github.com/libp2p/go-libp2p-kad-dht (v0.7.10 -> v0.7.11):
  - fix: optimize for the case where we're not subscribing to query events ([libp2p/go-libp2p-kad-dht#624](https://github.com/libp2p/go-libp2p-kad-dht/pull/624))
  - fix: don't spin when the event channel is closed ([libp2p/go-libp2p-kad-dht#622](https://github.com/libp2p/go-libp2p-kad-dht/pull/622))
- github.com/libp2p/go-libp2p-routing-helpers (v0.2.2 -> v0.2.3):
  - fix: avoid subscribing to query events unless necessary ([libp2p/go-libp2p-routing-helpers#43](https://github.com/libp2p/go-libp2p-routing-helpers/pull/43))
- github.com/lucas-clemente/quic-go (v0.15.5 -> v0.15.7):
  - reset the PTO when dropping a packet number space
  - move deadlineTimer declaration out of the Read loop
  - stop the deadline timer in Stream.Read and Write
  - fix buffer use after it was released when sending an INVALID_TOKEN error
  - create the session timer at the beginning of the run loop
  - stop the timer when the session's run loop returns

Co-Authored-By: Jacob Heun <jacobheun@gmail.com>

Co-Authored-By: MollyM <momack2@users.noreply.github.com>

Co-Authored-By: Jacob Heun <jacobheun@gmail.com>
Co-Authored-By: MollyM <momack2@users.noreply.github.com>
Co-Authored-By: Michael Burns <5170+mburns@users.noreply.github.com>

Co-Authored-By: MollyM <momack2@users.noreply.github.com>
Co-Authored-By: Jacob Heun <jacobheun@gmail.com>

add note about DHT performance improvements being dependent on the network upgrading to the Changelog

Co-Authored-By: Peter Rabbitson <ribasushi@protocol.ai>

The year should be "2020," not "2019."

GOFLAGS will _override_ all the flags. If we just want to set a tag e.g., enable
OpenSSL, we should set GOTAGS=openssl.

fixes https://github.com/ipfs/go-ipfs/issues/6622#issuecomment-576713181