tor/changes/bug30309

  o Code simplification and refactoring:
    - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
      it is not a constant-time function. Closes ticket 30309.
Rename tor_mem_is_zero to fast_mem_is_zero() For memeq and friends, "tor_" indicates constant-time and "fast_" indicates optimized. I'm fine with leaving the constant-time "safe_mem_is_zero" with its current name, but the "tor_" prefix on the current optimized version is misleading. Also, make the tor_digest_is_zero() uniformly constant-time, and add a fast_digest_is_zero() version to use as needed. A later commit in this branch will fix all the users of tor_mem_is_zero(). Closes ticket 30309. 2019-04-30 20:43:35 +02:00			`o Code simplification and refactoring:`
			`- Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that`
			`it is not a constant-time function. Closes ticket 30309.`