* Add dhcp6 client define, and update openthred-config include scheme
* #1663 - update include to use quotes instead of angle brackets
* #1663 - update file to use underscore instead of dash
* #1663 - remove extra space
* #1663 - update location of new header file and update files to point to it
* #1663 - update location of new header file and update files to point to it
* #1663 update makefile.am to include new header
* update for make pretty changes
* more pretty fixes
* cleanup, and remove automatic mbedtls change
* remove debugging change
* #1663 - Remove extra space, and change include to use angle brackets instead of quotes.
* rename the enable defines file to openthred_config
* #1663 clean up for code review
* #1663 - clean up last nits
* #1663 - missed merge conflicts - file openthread-config.h -> openthread/openthread_config.h
Mike