This commit applies the initial patches (ts.tar.gz) from https://bugs.ruby-lang.org/issues/4183

This compiles with several warnings. Tests don't run yet.

This commit applies the second patches (ts2.tar.gz) from https://bugs.ruby-lang.org/issues/4183

This commit applies the third patches (tsr3.tar.gz) from https://bugs.ruby-lang.org/issues/4183

A number of conventions seem to have changed, causing a fair bit of breakage:
  - `Data_*` was deprecated in favor of `TypedData_*`
  - `ossl_obj2bio` takes a `VALUE*` instead of `VALUE` now
  - `time_to_time_t()` was removed

- clean up whitespace
- be consistent with not returning after ossl_raise
- use accessor functions when working with openssl TS_* structs
- backport accessors for TS_STATUS_INFO, TS_VERIFY_CTX, and TS_RESP_CTX as macros

- define missing TS_RESP_CTX_set_time_cb
- handle alternate case for nil oid

- make some global variables static instead of extern
- get rid of GetTsReqPtr/GetTsRespPtr functions
- don't use c99 comments
- fix some leaks
- clarify what numeric type is returned (Integer or BN, never Fixnum)
- typos
- add missing checks, remove unecessary checks
- use OPENSSL_NO_TS instead of our own macros checking for ts support
- use EVP_{digest-name} instead of looking up algos by NID
- don't differentiate between failure reasons when verifying
- rename Response#pkcs7 to #token

This method allowed roots and intermediates to be specified in a number of ways.
This complexity wasn't super valuable though and its better to only allow an
X509::Store with an optional Array of intermediates. This greatly simplifies
the code and fixes a few leaks.