Sysrepo

This version features the following improvements:

- `sr_discard_items()` function for discarding stored operational changes
- key-less list data retrieval fixes
- module data tree build optimizations
- minor internal refactoring
- various other improvements and bugfixes

This release depends on libyang ([v2.1.80](https://github.com/CESNET/libyang/releases/tag/v2.1.80))

This version features the following improvements:

- datastore plugin API improved
- `factory-default` datastore support
- preferred `CLOCK_MONOTONIC` use
- parallel module change event notify
- minor optimizations
- other bugfixes and fixed corner-cases

This release depends on libyang ([v2.1.55](https://github.com/CESNET/libyang/releases/tag/v2.1.55))

This version features the following improvements:

- default datastore format changed from LYB to JSON
- has negligible performance impact and is much more robust
- some specific high-demand scenario optimizations
- `sr_cond_futex` active waiting fixed (by irfanHaslanded)
- datastore files permission problems fixed
- native `schema-mount` support
- other minor bugfixes

This release depends on libyang ([v2.1.30](https://github.com/CESNET/libyang/releases/tag/v2.1.30))

This version features the following improvements:

- alternative futex-based (Linux only) conditional variable implementation
- automatically used if futex is available
- is robust unlike `pthread_cond_t`
- support for batch module install/remove/update
- new operational poll subscriptions
- allow caching of pull operational data
- multiple same xpath pull operational subscriptions
- notified in parallel
- simplified deletion of stored oper data
- subscription event corner-case data race handled resulting in a stale event
- invalid data cache crashes fixed
- `sysrepo-plugind` internal plugins with YANG configuration
- oper poll diff
- stored notification rotation
- lots of other fixes and improvements

This release depends on libyang ([v2.1.4](https://github.com/CESNET/libyang/releases/tag/v2.1.4))

This version features the following improvements:

- `schema-mount` support improvements
- lots of various bugfixes

This release depends on libyang ([v2.0.231](https://github.com/CESNET/libyang/releases/tag/v2.0.231))

This version features the following improvements:

- DS plugin optional caching
- moved from *sysrepo* internals
- LYB DS plugin improvements
- such as persistent persmissions for all the datastores
- NACM improvements
- honor all permission options
- dependent module update fix
- other various bugfixes
- RPM scripts updated

This release depends on libyang ([v2.0.194](https://github.com/CESNET/libyang/releases/tag/v2.0.194))