PROTON-1766: [c] Remove use of pn_record_t in libuv proactor.
PROTON-1766: [c] Remove use of pn_record_t in libuv proactor.

apache/qpid-proton,gemmellr/qpid-proton,alanconway/qpid-proton,ChugR/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,ssorj/qpid-proton,ChugR/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,alanconway/qpid-proton,alanconway/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,alanconway/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,gemmellr/qpid-proton,ChugR/qpid-proton,alanconway/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,alanconway/qpid-proton,kgiusti/qpid-proton,kgiusti/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton