activeslave.h/cc: OSD slave process. Must be running on each OSD.

msgtestclient.h/cc: OSD master process. Run ./msgtestclient with no parameters for help.

trivial_task_ipc.h/cc: A trivial task to be built as a library. Uses
client interface from ../ceph_ipc; server from ../ceph_ipc must be
running on each OSD.

common.h, inet.h, utility.h, socket_utility.h: Helper functions.

activemaster, activetaskd, trivial_task_test, trivial_task: obsolete.