Refactor to remove code duplication in rotctl*.c

tests/rotctl.c

@@ -509,6 +509,4 @@ void usage()
     );
 
     usage_rot(stdout);
-
-    printf("\nReport bugs to <hamlib-developer@lists.sourceforge.net>.\n");
 }

tests/rotctl_parse.c

@@ -1572,6 +1572,8 @@ void usage_rot(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/rotctld.c

@@ -734,6 +734,4 @@ void usage()
         portno);
 
     usage_rot(stdout);
-
-    printf("\nReport bugs to <hamlib-developer@lists.sourceforge.net>.\n");
 }