This fuzzes the config file parser, and the converrsion to X.509
extensions. The initial corpus was computed by:
1. Import every file from OpenSSL 1.1.1 that ends in .cnf.
2. For each section in each such file, add a copy with that section
copied to the top (the "default") section.
3. Also add a file for each unit test.
4. Minimize the corpus.
While I'm here, sort the targets in fuzz/CMakeLists.txt.
Change-Id: I0cfc1ae8e2be3e67dae361605ad19833aec3fe4d
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/56167
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>