Beyond generally eliminating unnecessary includes, eliminate as many
includes of headers that declare/define particularly error-prone
functionality like strlen, malloc, and free. crypto/err/internal.h was
added to remove the dependency on openssl/thread.h from the public
openssl/err.h header. The include of <stdlib.h> in openssl/mem.h was
retained since it defines OPENSSL_malloc and friends as macros around
the stdlib.h functions. The public x509.h, x509v3.h, and ssl.h headers
were not changed in order to minimize breakage of source compatibility
with external code.

Change-Id: I0d264b73ad0a720587774430b2ab8f8275960329
Reviewed-on: https://boringssl-review.googlesource.com/4220
Reviewed-by: Adam Langley <agl@google.com>

gmtime_s first appeared in MSVCR80, but libmingwex has a helper function
that tries to find the symbol or falls back to an internal
implementation.

(Patch by Kenny Root.)

Change-Id: I96ef9cd7459d7e8202831a4e687dfbc055c9f50b
Reviewed-on: https://boringssl-review.googlesource.com/4091
Reviewed-by: Adam Langley <agl@google.com>

Everything else.

Change-Id: Iac02b144465b4e7b6d69ea22ff2aaf52695ae732

NaCl defines _POSIX_C_SOURCE on the command line for some reason, thus
we have to be defensive about defining it.

Change-Id: Icbc8afcb1ac0e0ca23b788b11ea911c3f55a8b7f
Reviewed-on: https://boringssl-review.googlesource.com/1891
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

_BSD_SOURCE has been deprecated (see bug). The manpage for printf
suggests that any _POSIX_C_SOURCE >= 200112L is also sufficient to bring
in the needed declarations and the bug reporter confirms that it's
sufficient for him.

https://code.google.com/p/chromium/issues/detail?id=419859

Change-Id: Ifc053f11c5aa1df35aae8e952d2c73a7f4599ec2
Reviewed-on: https://boringssl-review.googlesource.com/1890
Reviewed-by: Adam Langley <agl@google.com>

Windows doesn't have ssize_t, sadly. There's SSIZE_T, but defining an
OPENSSL_SSIZE_T seems worse than just using an int.

Change-Id: I09bb5aa03f96da78b619e551f92ed52ce24d9f3f
Reviewed-on: https://boringssl-review.googlesource.com/1352
Reviewed-by: Adam Langley <agl@google.com>

PNaCl needs OPENSSL_NO_ASM to work and a couple of cases were missing
because it hasn't previously been tested.

Additionally, it defined _BSD_SOURCE and others on the command line,
causing duplicate definition errors when defined in source code.

It's missing readdir_r.

It uses newlib, which appears to use u_short in socket.h without ever
defining it.

Change-Id: Ieccfc7365723d0521f6327eebe9f44a2afc57406
Reviewed-on: https://boringssl-review.googlesource.com/1140
Reviewed-by: Adam Langley <agl@google.com>

Initial fork from f2d678e6e8 (1.0.2 beta).

(This change contains substantial changes from the original and
effectively starts a new history.)