Kconfig updates for v4.17 - improve checkpatch for more precise Kconfig code checking - clarify effective selects by grouping reverse dependencies in help - do not write out '# CONFIG_FOO is not set' from invisible symbols - make oldconfig as silent as it should be - rename 'silentoldconfig' to 'syncconfig' - add unit-test framework and several test cases - warn unmet dependency of tristate symbols - make unmet dependency warnings readable, removing false positives - improve recursive include detection - use yylineno to simplify the line number tracking - misc cleanups