Include sasl.h from standard path

<sasl/sasl.h> is the standard include path for sasl.h.
``pkg-config --cflags libsasl2`` agrees with me.

Signed-off-by: Christian Heimes <cheimes@redhat.com>

Modules/LDAPObject.c

@@ -13,11 +13,7 @@
 #include "options.h"
 
 #ifdef HAVE_SASL
-#ifdef __APPLE__
 #include <sasl/sasl.h>
-#else
-#include <sasl.h>
-#endif
 #endif
 
 static void free_attrs(char***, PyObject*);

setup.cfg

@@ -8,7 +8,7 @@
 # Define extra include and library dirs if needed. distutils adds non
 # standard library_dirs as rpath.
 # library_dirs = /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64
-# include_dirs = /usr/include /usr/include/sasl /usr/local/include /usr/local/include/sasl
+# include_dirs = /usr/include /usr/local/include
 
 # These defines needs OpenLDAP built with
 # ./configure --with-cyrus-sasl --with-tls