various fixes for Open Watcom build

[jmalak]

Description

• fix build for OS/2
• fix build for Open Watcom 1.9

Testing

How did you test?

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[wolfSSL-Bot]

Can one of the admins verify this patch?

[dgarske]

Okay to test. Contributor agreement on file.

[dgarske]

[check-source-text] [2 of 7] [wolfssl]
    autogen.sh wolfssl...   real 0m6.269s  user 0m5.111s  sys 0m0.173s
    configure...   real 0m9.228s  user 0m6.944s  sys 0m1.494s
unrecognized macros used:
__UNIX__
add well-formed but unknown macros to /tmp/workspace/PRB-multi-test-script/wolfssl/.wolfssl_known_macro_extras.
    [skipping "codespell" subtest in check-source-text -- codespell is missing or too old]
overlong lines added:
wolfcrypt/benchmark/benchmark.c:15003     WC_INLINE double current_time(int reset) { (void)reset; return ((double)clock())/CLOCKS_PER_SEC; }
wolfssl/test.h:1499 #endif  /* !defined(USE_WINDOWS_API) && !defined(__WATCOMC__) && !defined(__OS2__) */
wolfssl/wolfcrypt/ecc.h:290 #if !defined(WOLFSSL_ECC_CURVE_STATIC) && defined(USE_WINDOWS_API) && !defined(__WATCOMC__)
wolfssl/wolfcrypt/wc_port.h:130             #undef _WINSOCKAPI_ /* undefine it for MINGW winsock2.h header file */
wolfssl/wolfio.h:898         #if defined(__OS2__) || defined(__NT__) && (NTDDI_VERSION >= NTDDI_VISTA)
wolfssl/wolfio.h:901             #define XINET_NTOP(a,b,c,d) strncpy((c),inet_ntoa(*(unsigned *)(b)),(d))
wolfssl/wolfio.h:911         #if defined(__OS2__) || defined(__NT__) && (NTDDI_VERSION >= NTDDI_VISTA)
    check-source-text fail_K
    failed config: '--srcdir' '.' '--disable-jobserver' '--enable-option-checking=fatal' '--enable-all' '--enable-testcert' '--enable-acert' '--enable-dtls13' '--enable-dtls-mtu' '--enable-dtls-frag-ch' '--enable-quic'

[dgarske]

Retest this please: "hudson.plugins.git.GitException: Failed to fetch from"

[dgarske]

Retest this please