Conflicting types for snprintf and vnsprintf on MacOSX build

[carloscabanero]

When building under latest macOS, the build on MacOSX platform will fail with the following error. It looks like there were some changes and the configure test is not detecting this properly. For the time being we have disabled MacOSX versions of the library as we don't need them for our use case. We should probably start by updating the library itself as a lot may have changed in upstream itself. This looks like a deprecation that is now hitting our way. Other ideas for fixes: https://stackoverflow.com/questions/68203667/c-compiler-error-expected-parameter-declarator

bsd-snprintf.c:862:1: error: expected parameter declarator
vsnprintf (char *str, size_t count, const char *fmt, va_list args)                                                                             
^                          
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/include/secure/_stdio.h:75:40: note: expanded from macro 'vsnprintf'                                           
  __builtin___vsnprintf_chk (str, len, 0, __darwin_obsz(str), format, ap)