Dgraph v1.2.4

Note: Please use v1.2.3 instead of this release. We are currently investigating a fix for Alpha crashes reported in #5456.

Changed

• Return error response if encoded response is > 4GB in size. Replace idMap with idSlice in encoder. (#5359)
• Change the default ratio of traces from 1 to 0.01. (#5405)

Fixed

• Export: Ignore deleted predicates from schema. Fixes #5053. (#5327)
• Fix segmentation fault in query.go. (#5377)
• Update group checksums when combining multiple deltas. Fixes #5368. (#5394)
• Fix empty string checks. (#5396)
• Fix protobuf headers check. (#5381)
• Stream the full set of predicates and types during a snapshot. (#5444)

Security

• Use SensitiveByteSlice type for hmac secret. (#5451)