capabilities, RRC/HO, stats conf, split reporting, S1AP The following features have been added: * capabilities: new endpoint /capabilities to show the active end-points handled by applications * RRC/HO: improvements to RRC statistics; the RTC can trigger a handover * stats conf: end-points to reconfigure the statistics reporting * split reporting: fields to indicate the used split, per agent * S1AP: report some statistics on S1AP * a "recursive" cmake is used. protobuf fields are generated at build (not configure) time, and compile times are reduced Furthermore: * documentation has been updated and some bugs were corrected * bugfixes * use deterministic Pistache commit