Close rig on set_powerstat 0 -- Linux was unable to reconnect to IC-7300

https://github.com/Hamlib/Hamlib/issues/1212

NEWS

@@ -26,6 +26,7 @@ Version 4.6
 
 Version 4.5.4
         * 2023-XX-XX
+        * Fix set_powerstat 0 to reopen with IC-7300 (and others?) on Linux
         * Fix FT-710 usage on 60M
         * Fix timing on NRD-535D
         * Fix AGC levels with rigctld

src/rig.c

@@ -6014,6 +6014,9 @@ int HAMLIB_API rig_set_powerstat(RIG *rig, powerstat_t status)
     HAMLIB_TRACE;
     retcode = rig->caps->set_powerstat(rig, status);
     rig_flush(&rig->state.rigport); // if anything is queued up flush it
+
+    if (status == RIG_POWER_OFF) { rig_close(rig); }
+
     RETURNFUNC(retcode);
 }