what's the dbeingtribution with grsecurity being optional and compile time buffer checks being yes
CREATE TABLE "security_features" (
  "distribution" text,
  "compile_time_buffer_checks" text,
  "mandatory_access_control" text,
  "software_executable_space_protection" text,
  "grsecurity" text,
  "rsbac" text
);
SELECT "distribution" FROM "security_features" WHERE "grsecurity"='Optional' AND "compile_time_buffer_checks"='Yes';