Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4431)

Reviewed-by: NRichard Levitte <levitte@openssl.org>

Document thread-safe lock creation
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

All OpenSSL code has now been transferred to use the new threading API,
so the old one is no longer used and can be removed. We provide some compat
macros for removed functions which are all no-ops.

There is now no longer a need to set locking callbacks!!
Reviewed-by: NRichard Levitte <levitte@openssl.org>

This was done by the following
        find . -name '*.[ch]' | /tmp/pl
where /tmp/pl is the following three-line script:
        print unless $. == 1 && m@/\* .*\.[ch] \*/@;
        close ARGV if eof; # Close file to reset $.

And then some hand-editing of other files.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

There are header files in crypto/ that are used by a number of crypto/
submodules.  Move those to crypto/include/internal and adapt the
affected source code and Makefiles.

The header files that got moved are:

crypto/cryptolib.h
crypto/md32_common.h
Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NTim Hudson <tjh@openssl.org>

OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
Two typo's on #endif comments fixed:
	OPENSSL_NO_ECB fixed to OPENSSL_NO_OCB
	OPENSSL_NO_HW_SureWare fixed to OPENSSL_NO_HW_SUREWARE
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Submitted By: Ger Hobbelt <ger@hobbelt.com>

Check callback return value when outputting errors.

deprecate the original (numeric-only) scheme, and replace with the
CRYPTO_THREADID object. This hides the platform-specifics and should reduce
the possibility for programming errors (where failing to explicitly check
both thread ID forms could create subtle, platform-specific bugs).

Thanks to Bodo, for invaluable review and feedback.

version some time soon.

to 'unsigned long' (ie. odd platforms/compilers), so a pointer-typed
version was added but it required portable code to check *both* modes to
determine equality. This commit maintains the availability of both thread
ID types, but deprecates the type-specific accessor APIs that invoke the
callbacks - instead a single type-independent API is used.  This simplifies
software that calls into this interface, and should also make it less
error-prone - as forgetting to call and compare *both* thread ID accessors
could have led to hard-to-debug/infrequent bugs (that might only affect
certain platforms or thread implementations). As the CHANGES note says,
there were corresponding deprecations and replacements in the
thread-related functions for BN_BLINDING and ERR too.

first everywhere in crypto and skip stdio.h and string.h [because it
includes them].

the same source file.

errors through an arbitrary function.

sure they are available in opensslconf.h, by giving them names starting
with "OPENSSL_" to avoid conflicts with other packages and by making
sure e_os2.h will cover all platform-specific cases together with
opensslconf.h.

I've checked fairly well that nothing breaks with this (apart from
external software that will adapt if they have used something like
NO_KRB5), but I can't guarantee it completely, so a review of this
change would be a good thing.

Submitted by:
Reviewed by:
PR: