diff --git a/common.c b/common.c
index b920c33..5f87d8c 100644
--- a/common.c
+++ b/common.c
@@ -20,6 +20,7 @@
 
 #define LIBERTY_WANT_SSL
 #define LIBERTY_WANT_POLLER
+#define LIBERTY_WANT_PROTO_IRC
 
 #define print_fatal_data    ((void *) LOG_ERR)
 #define print_error_data    ((void *) LOG_ERR)
@@ -48,173 +49,3 @@ log_message_syslog (void *user_data, const char *quote, const char *fmt,
 	if (vsnprintf (buf, sizeof buf, fmt, ap) >= 0)
 		syslog (prio, "%s%s", quote, buf);
 }
-
-// --- IRC utilities -----------------------------------------------------------
-
-struct irc_message
-{
-	struct str_map tags;                ///< IRC 3.2 message tags
-	char *prefix;                       ///< Message prefix
-	char *command;                      ///< IRC command
-	struct str_vector params;           ///< Command parameters
-};
-
-static void
-irc_parse_message_tags (const char *tags, struct str_map *out)
-{
-	struct str_vector v;
-	str_vector_init (&v);
-	split_str_ignore_empty (tags, ';', &v);
-
-	for (size_t i = 0; i < v.len; i++)
-	{
-		char *key = v.vector[i], *equal_sign = strchr (key, '=');
-		if (equal_sign)
-		{
-			*equal_sign = '\0';
-			str_map_set (out, key, xstrdup (equal_sign + 1));
-		}
-		else
-			str_map_set (out, key, xstrdup (""));
-	}
-
-	str_vector_free (&v);
-}
-
-static void
-irc_parse_message (struct irc_message *msg, const char *line)
-{
-	str_map_init (&msg->tags);
-	msg->tags.free = free;
-
-	msg->prefix = NULL;
-	msg->command = NULL;
-	str_vector_init (&msg->params);
-
-	// IRC 3.2 message tags
-	if (*line == '@')
-	{
-		size_t tags_len = strcspn (++line, " ");
-		char *tags = xstrndup (line, tags_len);
-		irc_parse_message_tags (tags, &msg->tags);
-		free (tags);
-
-		line += tags_len;
-		while (*line == ' ')
-			line++;
-	}
-
-	// Prefix
-	if (*line == ':')
-	{
-		size_t prefix_len = strcspn (++line, " ");
-		msg->prefix = xstrndup (line, prefix_len);
-		line += prefix_len;
-	}
-
-	// Command name
-	{
-		while (*line == ' ')
-			line++;
-
-		size_t cmd_len = strcspn (line, " ");
-		msg->command = xstrndup (line, cmd_len);
-		line += cmd_len;
-	}
-
-	// Arguments
-	while (true)
-	{
-		while (*line == ' ')
-			line++;
-
-		if (*line == ':')
-		{
-			str_vector_add (&msg->params, ++line);
-			break;
-		}
-
-		size_t param_len = strcspn (line, " ");
-		if (!param_len)
-			break;
-
-		str_vector_add_owned (&msg->params, xstrndup (line, param_len));
-		line += param_len;
-	}
-}
-
-static void
-irc_free_message (struct irc_message *msg)
-{
-	str_map_free (&msg->tags);
-	free (msg->prefix);
-	free (msg->command);
-	str_vector_free (&msg->params);
-}
-
-static void
-irc_process_buffer (struct str *buf,
-	void (*callback)(const struct irc_message *, const char *, void *),
-	void *user_data)
-{
-	char *start = buf->str, *end = start + buf->len;
-	for (char *p = start; p + 1 < end; p++)
-	{
-		// Split the input on newlines
-		if (p[0] != '\r' || p[1] != '\n')
-			continue;
-
-		*p = 0;
-
-		struct irc_message msg;
-		irc_parse_message (&msg, start);
-		callback (&msg, start, user_data);
-		irc_free_message (&msg);
-
-		start = p + 2;
-	}
-
-	// XXX: we might want to just advance some kind of an offset to avoid
-	//   moving memory around unnecessarily.
-	str_remove_slice (buf, 0, start - buf->str);
-}
-
-static int
-irc_tolower (int c)
-{
-	if (c == '[')   return '{';
-	if (c == ']')   return '}';
-	if (c == '\\')  return '|';
-	if (c == '~')   return '^';
-	return c >= 'A' && c <= 'Z' ? c + ('a' - 'A') : c;
-}
-
-static size_t
-irc_strxfrm (char *dest, const char *src, size_t n)
-{
-	size_t len = strlen (src);
-	while (n-- && (*dest++ = irc_tolower (*src++)))
-		;
-	return len;
-}
-
-static int
-irc_strcmp (const char *a, const char *b)
-{
-	int x;
-	while (*a || *b)
-		if ((x = irc_tolower (*a++) - irc_tolower (*b++)))
-			return x;
-	return 0;
-}
-
-static int
-irc_fnmatch (const char *pattern, const char *string)
-{
-	size_t pattern_size = strlen (pattern) + 1;
-	size_t string_size  = strlen (string)  + 1;
-	char x_pattern[pattern_size], x_string[string_size];
-	irc_strxfrm (x_pattern, pattern, pattern_size);
-	irc_strxfrm (x_string,  string,  string_size);
-	return fnmatch (x_pattern, x_string, 0);
-}
diff --git a/liberty b/liberty
index 0876458..8c6d187 160000
--- a/liberty
+++ b/liberty
@@ -1 +1 @@
-Subproject commit 087645848baec5e59e4296817850bd5dd240cbb2
+Subproject commit 8c6d18757d2d4135963f3dbab6d2d5ec8c8b6af3