Prior to this commit, we only allowed CMake options to be specified according to
a finite set of values. For example if an option "WOLFSSL_FEATURE" was permitted
to take only the values "yes" and "no" and a user ran
`cmake -DWOLFSSL_FEATURE=ON`, that would fail because ON isn't in `[yes, no]`.
However, this behavior runs counter to CMake's way of evaluating boolean values,
which permits a variety of values that evaluate to true/false (see
https://cmake.org/cmake/help/latest/command/if.html#basic-expressions). This
commit will allow the user to specify any value for a build option. If it's not
in the predefined set of values, we use CMake's "if" logic to reduce the value
to yes or no.
* Remove NTRU and OQS
* Keep the DTLS serialization format backwards compatible.
* Remove n from mygetopt_long() call.
* Fix over-zealous deletion.
* Resolve problems found by @SparkiDev
smallstack refactors for wolfcrypt/src/rsa.c:wc_CheckProbablePrime_ex() and wolfcrypt/src/pwdbased.c:wc_PKCS12_PBKDF_ex();
add WARN_UNUSED_RESULT macro to types.h;
text format cleanup;
fix internal.c:LowResTimer() implementation.
refactor tls13.c:TimeNowInMilliseconds() for kernel 4.9 and 3.16 compat.
use ktime_get_coarse_real_ts64() only for kernel 5.x+. in kernel 4.x, use its older form, current_kernel_time64(), and in 3.x, use getnstimeofday().
linuxkm/module_hooks.c: fix wolfssl_init() pie code to be compatible with kernel 4.4-;
fix allocate_wolfcrypt_irq_fpu_states() return codes to all be wolfcrypt codes, and in calling code, pass up that code (suggested by dgarske peer review).
configure.ac: fix ed25519/sha512 dependency test to not misfire when ENABLED_32BIT;
wolfssl/wolfcrypt/curve{25519,448}.h: fix redundant typedefs of curve{25519,448}_key (fixes -Wpedantic warnings);
configure.ac: fix for "ISO C forbids an empty translation unit [-Werror=pedantic]", re wolfcrypt/src/sp_c{32,64}.c;
configure.ac: fixes for --enable-32bit versus pedantic "ISO C forbids an empty translation unit", including explicit exclusion of 32bit-incompatible algorithms from enable-all and enable-all-crypto sets;
tests/api.c: fixes for a couple inadequately gated SHA2 dependencies;
tests/api.c:test_wolfSSL_set_alpn_protos(): fix prototype missing (void);
wolfcrypt/src/misc.c and wolfssl/wolfcrypt/misc.h: fix ForceZero() definition and NO_INLINE prototype to not counterfactually constify the mem ptr, to avoid -Wmaybe-uninitialized from gcc11;
wolfcrypt/src/des3.c: drop obsolete register qualifier from declaration in DesSetKey(), for c++17 compatibility;
src/ssl.c:wolfSSL_BN_mod_word(): fix cast of arg2 to mp_mod_d().
add build-time support for module signing using native Linux facility;
add support for alternative licenses using WOLFSSL_LICENSE macro;
improve load-time kernel log messages;
add support for sp-math-all asm/AVX2 acceleration;
add error-checking and return in SAVE_VECTOR_REGISTERS();
implement support for x86 accelerated crypto from interrupt handlers, gated on WOLFSSL_LINUXKM_SIMD_X86_IRQ_ALLOWED:
* wolfcrypt_irq_fpu_states
* am_in_hard_interrupt_handler()
* allocate_wolfcrypt_irq_fpu_states()
* free_wolfcrypt_irq_fpu_states()
* save_vector_registers_x86()
* restore_vector_registers_x86()
add WOLFSSL_LINUXKM_SIMD, WOLFSSL_LINUXKM_SIMD_X86, and WOLFSSL_LINUXKM_SIMD_ARM macros for more readable gating.
