moved memxor() to global.h
moved memxor() to global.h

malvira/tinydtls-code,fvdnabee/tinydtls,jvermillard/tinydtls,nmacs/tinydtls,OlegHahm/tinydtls,jvermillard/tinydtls,thecodemaiden/tinydtls-fork,nmacs/tinydtls,jvermillard/tinydtls,spark/tinydtls,spark/tinydtls,OlegHahm/tinydtls,nmacs/tinydtls,OlegHahm/tinydtls,LaKabane/tinydtls,fvdnabee/tinydtls,LaKabane/tinydtls,spark/tinydtls,thecodemaiden/tinydtls-fork,yunus/TinyDTLS-WebID,yunus/TinyDTLS-WebID,nmacs/tinydtls,thecodemaiden/tinydtls-fork,fvdnabee/tinydtls,malvira/tinydtls-code,yunus/TinyDTLS-WebID