Merge pull request #10163 from haukepetersen/opt_cord_restructuring

Makefile.dep

examples/cord_ep/Makefile

examples/cord_ep/README.md

examples/cord_ep/main.c

examples/cord_epsim/Makefile

examples/cord_epsim/README.md

examples/cord_epsim/main.c

examples/rdcli/README.md

makefiles/pseudomodules.inc.mk

sys/Makefile

sys/auto_init/auto_init.c

sys/include/net/cord/common.h

sys/include/net/cord/config.h

sys/include/net/cord/ep.h

sys/include/net/cord/ep_standalone.h

sys/include/net/cord/epsim.h

sys/net/application_layer/cord/common/Makefile

sys/net/application_layer/cord/common/cord_common.c

sys/net/application_layer/cord/doc.txt

sys/net/application_layer/cord/ep/Makefile