Update kenwood_transaction to improve cache invalidation

rigs/kenwood/kenwood.c

@@ -275,7 +275,7 @@ int kenwood_transaction(RIG *rig, const char *cmdstr, char *data,
     }
 
     if (strlen(cmdstr) > 2 || strcmp(cmdstr, "RX") == 0
-            || strcmp(cmdstr, "TX") == 0 || strcmp(cmdstr, "ZZTX") == 0)
+            || strncmp(cmdstr, "TX", 2) == 0 || strncmp(cmdstr, "ZZTX", 4) == 0)
     {
         // then we must be setting something so we'll invalidate the cache
         rig_debug(RIG_DEBUG_TRACE, "%s: cache invalidated\n", __func__);

rigs/kenwood/kenwood.h

@@ -27,7 +27,7 @@
 #include <string.h>
 #include "token.h"
 
-#define BACKEND_VER "20200624"
+#define BACKEND_VER "20200707"
 
 #define EOM_KEN ';'
 #define EOM_TH '\r'