Change code base to Nicira's for-nox/0.4 branch

Remove monolithic OpenFlow switch.
Add userspace datapath.
Fix BUG#13: Revise check wildcards for in_port != out_port output
validation.
Fix BUG#30: Made use of get_jiffies_64 instead of jiffies.
Fix BUG#31: Fix NetFPGA crash in case of test_delete test harness run.
Fix BUG#32: Add stack depth limitation to avoid inifinite loop in
log_backtrace.
Fix BUG#33: Improve NetFPGA kernel extension and NetFPGA image to
support MAC address rewrite features (two actions) on NetFPGA enabled
OpenFlow switch.
Fix BUG#34: Add NetFPGA kernel extension source codes to create
distribution package with NetFPGA correctly.
Fix BUG#38: Improve regression test for FLOW_MOD ACTION SET_DL_SRC and
SET_DL_DST.
Fix BUG#39: Correct misunderstanding of byte order ops for OFPAT_XXX.

lib/dynamic-string.c

@@ -94,6 +94,12 @@ ds_put_char_multiple(struct ds *ds, char c, size_t n)
     memset(ds_put_uninit(ds, n), c, n);
 }
 
+void
+ds_put_buffer(struct ds *ds, const char *s, size_t n)
+{
+    memcpy(ds_put_uninit(ds, n), s, n);
+}
+
 void
 ds_put_cstr(struct ds *ds, const char *s)
 {
@@ -172,13 +178,29 @@ ds_put_strftime(struct ds *ds, const char *template, const struct tm *tm)
     }
 }
 
+int
+ds_get_line(struct ds *ds, FILE *file)
+{
+    ds_clear(ds);
+    for (;;) {
+        int c = getc(file);
+        if (c == EOF) {
+            return ds->length ? 0 : EOF;
+        } else if (c == '\n') {
+            return 0;
+        } else {
+            ds_put_char(ds, c);
+        }
+    }
+}
+
 char *
 ds_cstr(struct ds *ds)
 {
     if (!ds->string) {
         ds_reserve(ds, 0);
-        ds->string[0] = '\0';
     }
+    ds->string[ds->length] = '\0';
     return ds->string;
 }