Slight improvements

src/main.c

@@ -1,4 +1,3 @@
-#include "printf.h"
 #include "string_buffer.h"
 #include "utils.h"
 #include "comment.h"
@@ -8,6 +7,7 @@
 
 #include <stdlib.h>
 #include <time.h>
+#include <stdio.h>
 
 #define COMMENTS_PER_PAGE 20
 #define MAX_NAME 1024
@@ -102,7 +102,7 @@ defer:
 void
 print_submit_form()
 {
-    fputs("<form action=\"\">\n"
+    fputs("<form action=\"\" method=\"POST\">\n"
         "<label>Your name:</label>\n"
         "<input type=\"text\" name=\"displayname\"><br>\n"
         "<label>Leave comment: </label><br>\n"
@@ -203,7 +203,7 @@ handle_submitted_comment()
    time(&header.creation_time);
    header.reply_id = rid;
    header.text_length = strlen(sanitized_text);
-   header.user_sid = "anonymous";
+   header.user_sid = "web/anonymous";
    header.user_displayname = displayname;
 
    if (driver.leave_comment(&driver_data, &header, sanitized_text) < 0) {

src/string_buffer.h

@@ -1,6 +1,8 @@
 #ifndef STRING_BUFFER_H
 #define STRING_BUFFER_H
 
+#include <stddef.h>
+
 /* "move" underlying contents of buffer to str shrinking it */
 /* TODO: handle realloc fail */
 #define SB_MOVE(buffer, str) do { \