librsplib-dev 3.4.4-1 (armhf binary) in ubuntu lunar

 Reliable Server Pooling (RSerPool) is the IETF's standard (RFC 5351 to
 RFC 5356) for a lightweight server pool and session management framework.
 It provides highly available pool management (that is registration
 handling and load distribution/balancing) by components called Registrar
 and a client-side/server-side API for accessing the service of a pool.
 .
 This package provides header files for the rsplib library. You need them
 to develop your own RSerPool-based clients and servers.