Patch to build on Haiku

[nigelhorne]

Please consider this patch, with it Net::SSLeay now build on Haiku R1/Beta5:

*** ../Net-SSLeay-1.94-5/Makefile.PL	2024-01-07 19:43:17.050593792 -0500
--- ./Makefile.PL	2024-09-26 10:44:10.662700032 -0400
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*** 120,125 ****
--- 120,130 ----
  # macros are available).
  add_ccflag( $eumm_args{CCFLAGS}, "-DNET_SSLEAY_PERL_VERSION=" . $] * 1e6 );
  
+ if(-d '/boot/system/develop/headers/x86/openssl') {
+ 	# Haiku
+ 	add_ccflag($eumm_args{'CCFLAGS'}, '-I/boot/system/develop/headers/x86/openssl');
+ }
+ 
  # Suppress deprecation warnings during compilation.
  # https://www.openssl.org/docs/manmaster/man7/openssl_user_macros.html
  add_ccflag( $eumm_args{CCFLAGS}, '-DOPENSSL_API_COMPAT=908' );
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*** 224,229 ****
--- 229,235 ----
      my @try_includes = (
          'include' => sub { 1 },
          'inc32'   => sub { $OSNAME eq 'MSWin32' },
+ 	'/boot/system/develop/headers/x86' => sub { $OSNAME eq 'haiku' },
      );
  
      while (
***************
*** 235,240 ****
--- 241,250 ----
                             || -f "$prefix/$dir/ssl.h")) {
              $opts->{inc_path} = "$prefix/$dir";
          }
+ 	if($cond->() && (-f "/$dir/openssl/ssl.h")) {
+ 		# e.g Haiku
+ 		$opts->{inc_path} = $dir;
+ 	}
      }
  
      # Directory order matters. With macOS Monterey a poisoned dylib is