Removing exit calls from config parser

* config.h: cleanup, left only internally needed definitions
* config.c: removed exit calls, use yyerror and yywarning
* config_gram.y: (Dito.)
* lexer.l: (Dito.)
* libavrdude.h: removed internal definitions of config parser
* main.c: removed yyerror, it is now in config.c
* jtagmkII.c: added missing free in error case
* pgm.c: replaced exits by returns
* pickit2.c: add missing return



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1322 81a1dc3b-b13d-400b-aceb-764788c761c2

jtagmkII.c

@@ -445,6 +445,7 @@ int jtagmkII_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   if (serial_send(&pgm->fd, buf, len + 10) != 0) {
     avrdude_message(MSG_INFO, "%s: jtagmkII_send(): failed to send command to serial port\n",
                     progname);
+    free(buf);
     return -1;
   }