David Bentham's updated QNX notification

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   (This section was graciously brought to us by David Bentham)

   By setting FD_SETSIZE early in connect.c we override the QNX default value

   and thus avoid a crash.

   Fortunately in the QNX headers its defined as

    #ifndef FD_SETSIZE

      #define FD_SETSIZE 32

    #endif

   so its relatively easy to override without changing the original

   definition. QNX claim posix compliance so this definition style could be

   standard in other o/s's. Eg Microsoft Visual C++ 6 defines it similarly,

   but its set to 64.

   As QNX is targetted for resource constrained environments, the QNX headers

   set conservative limits. This includes the FD_SETSIZE macro, set by default

   to 32. Socket descriptors returned within the CURL library may exceed this,

   resulting in memory faults/SIGSEGV crashes when passed into select(..)

   calls using fd_set macros.

   A good all-round solution to this is to override the default when building

   libcurl, by overriding CFLAGS during configure, example

   #  configure CFLAGS='-DFD_SETSIZE=64 -g -O2'

CROSS COMPILE

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