Changed default number of threads and added auto value.

Changed default number of threads to 1 instead of autoconfigured value and
added a new `auto` variable which enables autoconfiguration of thread count.

The number of threads used when autoconfiguratio fails was changed from 4 to 1.

The default value of using N threads where N is the number of CPU cores was
not optimal as the possibility of rescheduling was higher the more utility
threads there were. Due to this, N-1 is deemed to be the better autoconfigured
value for thread count.

server/include/maxconfig.h

@@ -41,6 +41,7 @@
 #define		DEFAULT_POLLSLEEP	1000	/**< Default poll wait time (milliseconds) */
 #define		_SYSNAME_STR_LENGTH	256	/**< sysname len */
 #define		_RELEASE_STR_LENGTH	256	/**< release len */
+#define		DEFAULT_NTHREADS	1 /**< Default number of polling threads */
 /**
  * Maximum length for configuration parameter value.
  */