Integrates Apache Solr software into the HumHub search subsystem.

Solr is highly reliable, scalable and fault tolerant, providing distributed indexing, replication and load-balanced querying, automated failover and recovery, centralized configuration and more. Solr powers the search and navigation features of many of the world's largest internet sites.

More information about Apache SOLR can be found here:

• https://lucene.apache.org/solr/