Blackbox header and function name tidy

src/main/blackbox/blackbox.c

@@ -1143,7 +1143,7 @@ static bool sendFieldDefinition(char mainFrameChar, char deltaFrameChar, const v
 
             // The first header is a field name
             if (xmitState.headerIndex == 0) {
-                blackboxPrint(def->name);
+                blackboxWriteString(def->name);
 
                 // Do we need to print an index in brackets after the name?
                 if (def->fieldNameIndex != -1) {
@@ -1359,7 +1359,7 @@ void blackboxLogEvent(FlightLogEvent event, flightLogEventData_t *data)
         blackboxWriteUnsignedVB(data->loggingResume.currentTime);
         break;
     case FLIGHT_LOG_EVENT_LOG_END:
-        blackboxPrint("End of log");
+        blackboxWriteString("End of log");
         blackboxWrite(0);
         break;
     }

src/main/blackbox/blackbox_encoding.c

@@ -51,7 +51,7 @@ void blackboxPrintfHeaderLine(const char *name, const char *fmt, ...)
 
     blackboxWrite('H');
     blackboxWrite(' ');
-    blackboxPrint(name);
+    blackboxWriteString(name);
     blackboxWrite(':');
 
     va_start(va, fmt);

src/main/blackbox/blackbox_encoding.h

@@ -19,7 +19,6 @@
 
 int blackboxPrintf(const char *fmt, ...);
 void blackboxPrintfHeaderLine(const char *name, const char *fmt, ...);
-int blackboxPrint(const char *s);
 
 void blackboxWriteUnsignedVB(uint32_t value);
 void blackboxWriteSignedVB(int32_t value);

src/main/blackbox/blackbox_io.c

@@ -84,7 +84,7 @@ void blackboxWrite(uint8_t value)
 }
 
 // Print the null-terminated string 's' to the blackbox device and return the number of bytes written
-int blackboxPrint(const char *s)
+int blackboxWriteString(const char *s)
 {
     int length;
     const uint8_t *pos;

src/main/blackbox/blackbox_io.h

@@ -39,6 +39,7 @@ extern int32_t blackboxHeaderBudget;
 
 void blackboxOpen(void);
 void blackboxWrite(uint8_t value);
+int blackboxWriteString(const char *s);
 
 void blackboxDeviceFlush(void);
 bool blackboxDeviceFlushForce(void);

src/test/unit/blackbox_encoding_unittest.cc

@@ -246,7 +246,7 @@ PG_REGISTER(blackboxConfig_t, blackboxConfig, PG_BLACKBOX_CONFIG, 0);
 int32_t blackboxHeaderBudget;
 void mspSerialAllocatePorts(void) {}
 void blackboxWrite(uint8_t value) {serialWrite(blackboxPort, value);}
-int blackboxPrint(const char *s)
+int blackboxWriteString(const char *s)
 {
     const uint8_t *pos = (uint8_t*)s;
     while (*pos) {