nsysnet/misc: Add socketclose_all and setsocklibopt

Author: GaryOderNichts

include/nsysnet/misc.h

@@ -10,9 +10,23 @@
 extern "C" {
 #endif
 
+typedef enum
+{
+   //! Prevents closing nsysnet sockets during socketclose_all
+   //! Note: No-op if security level is prod
+   SOLIB_OPT_AVOID_CLOSE_ALL = 0x3000,
+} SocklibOpt;
+WUT_CHECK_SIZE(SocklibOpt, 4);
+
 int
 set_multicast_state(BOOL multicastEnable);
 
+int
+socketclose_all(void);
+
+int
+setsocklibopt(SocklibOpt opt, uint32_t value);
+
 #ifdef __cplusplus
 }
 #endif