Remove EVP_add_{cipher,digest}* docs

Mention which functions are implemented as macros in the few cases
where that information was missing.

Briefly mention SSLeay_add_all_algorithms(3) because
surprisingly large numbers of software packages still call it.

Mark the unused aliases OPENSSL_add_all_algorithms_conf(3),
OPENSSL_add_all_algori

Briefly mention SSLeay_add_all_algorithms(3) because
surprisingly large numbers of software packages still call it.

Mark the unused aliases OPENSSL_add_all_algorithms_conf(3),
OPENSSL_add_all_algorithms_noconf(3), SSLeay_add_all_ciphers(3),
and SSLeay_add_all_digests(3) as intentionally undicumented.

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Add more cross references

Remove OBJ_add_sigid and OBJ_sigid_free documentation

These will be made internal and will likely go away. The OBJ_add_sigid.3
manual should probably be renamed; this can be done in a second step.

new manual page OBJ_add_sigid(3)

new manual page OBJ_NAME_add(3)

document obj_cleanup_defer(3) and check_defer(3)

Further improve the documentation of library initialization and configuration.
Among other improvements:
* Use a uniform wording at the top of the DECSRIPTION for obsolete pages.
* Better explain how

Further improve the documentation of library initialization and configuration.
Among other improvements:
* Use a uniform wording at the top of the DECSRIPTION for obsolete pages.
* Better explain how to use a non-standard configuration file.
* Remove obsolete functions from SEE ALSO.
Triggered by some suggestions from tb@.
Tweaks and OK tb@.

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found a complete archive of SSLeay-0.4 to SSLeay-0.8.1b tarballs
on the web, so fix up SSLeay HISTORY accordingly

crypto HISTORY up to 0.9.5; researched from OpenSSL git

Catch up after beck@ fixed autoconfiguration:
* Say more precisely what OPENSSL_config(3) and OPENSSL_no_config(3) do.
* Revert the deprecation notice for them, nothing wrong with them.
* Document OP

Catch up after beck@ fixed autoconfiguration:
* Say more precisely what OPENSSL_config(3) and OPENSSL_no_config(3) do.
* Revert the deprecation notice for them, nothing wrong with them.
* Document OPENSSL_INIT_LOAD_CONFIG.
* Deprecate OpenSSL_add_all_algorithms(3), it's now automatic.
* Add OpenSSL_add_all_algorithms(3) HISTORY.
Substantial feedback and OK beck@.

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Copyright and license

various cleanup;

first pass; ok schwarze

convert configuration manuals from pod to mdoc