Refactor to remove code duplication in ampctl*.c

tests/ampctl.c

@@ -466,6 +466,4 @@ void usage()
     );
 
     usage_amp(stdout);
-
-    printf("\nReport bugs to <hamlib-developer@lists.sourceforge.net>.\n");
 }

tests/ampctl_parse.c

@@ -1492,6 +1492,8 @@ void usage_amp(FILE *fout)
             "Commands and arguments read from standard input must be white space separated,\n"
             "comments are allowed, comments start with the # character and continue to the\n"
             "end of the line.\n");
+
+    fprintf(fout, "\nReport bugs to <hamlib-developer@lists.sourceforge.net>.\n");
 }
 
 

tests/ampctld.c

@@ -705,6 +705,4 @@ void usage()
         portno);
 
     usage_amp(stdout);
-
-    printf("\nReport bugs to <hamlib-developer@lists.sourceforge.net>.\n");
 }