Notable changes

allowdeprecated in zcash.conf

In v5.0.0 a feature deprecation framework was released, to enable zcashd features to be formally deprecated and removed:

• In stage 1, a feature is marked as deprecated, but otherwise left as-is. It remains in this stage for at least 18 weeks.
• In stage 2, the feature is default-disabled, but can be re-enabled with the -allowdeprecated config option. It remains in this stage for at least 18 weeks.
• Finally, the feature is removed - either entirely, or (e.g. in the case of RPC methods that were inherited from Bitcoin Core) with a "tombstone" left to inform users of the removal (and what to use instead if applicable).

Config options can be specified either as a zcashd argument (-option=value) or in zcash.conf (as a option=value line). However, due to a bug in the implementation, allowdeprecated=feature lines in zcash.conf were ignored. The bug went unnoticed until v5.4.0, in which the first group of features moved from stage 1 to stage 2. This hotfix release fixes the bug.

Fixed RPC blocking and wallet view lag on reindex

The known issue reported in the v5.4.0 release notes has been fixed.