src/coap_tinydtls.c:
Replace UNUSED with COAP_UNUSED that got missed from a merge.
man/examples-code-check.c:
src/pdu.c:
tests/oss-fuzz/pdu_parse_target.c:
Fix trailing white space.
win32/libcoap.vcxproj:
win32/testdriver/testdriver.vcxproj:
Correct include/coap2 paths.