Fix: Corrected Copyright headers

src/auth_anonymous.c

src/auth_htpasswd.c

src/auth_static.c

src/auth_url.c

src/compat.h

src/configtest.c

src/connection.h

src/curl.c

src/event.c

src/event_exec.c

src/event_log.c

src/event_url.c

src/format.c

src/format.h

src/format_ebml.c

src/format_flac.c

src/format_flac.h

src/format_kate.c

src/format_kate.h

src/format_midi.c