* additional OCSP bindings for the response builder

* use the OCSP extension funcs that match the rest of x509

* add OCSP request parsing support with OCSPNonce

* add docs

* reprs man

* make extensions a cached property

* try something a bit different.

* newer compiler plz

* permute

* fix some warnings

* fix getters on OpenSSL < 1.1.0

* this is getting involved

* given our compiler flags we can't have SSL_CTX_set_cookie_verify_cb

* add many OCSP bindings

Much of OCSP was opaqued in 1.1.0 so this also adds a bunch of getters
for older OpenSSL. However, 1.1.0 itself made it impossible to access
certain fields in the opaque struct, so we're forced to de-opaque them
for 1.1.0 through 1.1.0i as well as 1.1.1-pre1 through 1.1.1-pre9. There
is a patch (openssl/openssl#7082) that fixes this and should be in
1.1.0j and 1.1.1-pre10 (or 1.1.1 final, whichever they choose to issue)

* backslashes are sometimes useful

* comments

* make an ocsp request

* update test, add docs

* make it an OCSPRequestBuilder

* review feedback and more tests

* make it a class

* empty commit to retrigger

* type check

* add OCSP binding for obtaining information from CertID structure

* empty commit

* No more FUNCS/MACROS distinction

* change the docs to not talk about MACROS since they're gone

* remove out of date comment