Implement getbool.

config.c

@@ -129,6 +129,29 @@ getint(int c, int *int_r, gnc_t gnc, void *closure)
     return c;
 }
 
+static int
+getbool(int c, int *int_r, gnc_t gnc, void *closure)
+{
+    char *t;
+    int i;
+    c = getword(c, &t, gnc, closure);
+    if(c < -1)
+        return c;
+    if(strcmp(t, "true") == 0 || strcmp(t, "yes") == 0)
+        i = CONFIG_YES;
+    else if(strcmp(t, "false") == 0 || strcmp(t, "no") == 0)
+        i = CONFIG_NO;
+    else if(strcmp(t, "default") == 0)
+        i = CONFIG_DEFAULT;
+    else {
+        free(t);
+        return -2;
+    }
+    free(t);
+    *int_r = i;
+    return c;
+}
+
 static int
 getip(int c, unsigned char **ip_r, int *af_r, gnc_t gnc, void *closure)
 {