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* Update to BearSSL 0.6+ release, add AES_CCM modes Pull in latest BearSSL head (0.6 + minor additions) release and add AES_CCM modes to the encryption options. * Enable the aes_ccm initialization in client/server * Initial attempt * Working code with second stack thunking * Remove #ifdefs in .S file, not needed. * Clean up thunks and remove separate stack flag * Fix PIO assembler errors * Remove #ifdef code changes, ensure same code as PC Remove "#ifdef ESP8266;...;#else;...;#endif" brackets in BearSSL to ensure the host-tested code is the same as the ESP8266-run code. * Move to latest BearSSL w/EC progmem savings * Merge with master * Add br_thunk_* calls to do ref counting, painting Add reference counting br_thunk_add/del_ref() to replace stack handling code in the class. Add in stack painting and max usage calculation. * Add in postmortem stack dump hooks When a crash occurs while in the second stack, dump the BSSL stack and then also the stack that it was called from (either cont or sys). * Update stack dump to match decoder expectations * Move thunk to code core for linkiage The thunk code needs to be visible to the core routines, so move it to the cores/esp8266 directory. Probably need to refactor the stack setup and the bearssl portion to avoid dependency on bearssl libs in cores/esp8266 * Add 2nd stack dump utility routine * Refactor once more, update stack size, add stress Make stack_thunks generic, remove bearssl include inside of cores/esp8266. Allocate the stack on a WiFiServerSecure object creation to avoid fragmentation since we will need to allocate the stack to do any connected work, anyway. A stress test is now included which checks the total BearSSL second stack usage for a variety of TLS handshake and certificate options from badssl.org. * Update to latest to-thunks branch * Add BearSSL device test using stack stress Run a series of SSL connection and transmission tests that stress BearSSL and its stack usage to the device tests. Modify device tests to include a possible SPIFFS generation and upload when a make_spiffs.py file is present in a test directory. * Use bearssl/master branch, not /to-thunks branch Update to use the merged master branch of bearssl. Should have no code changes.