allow display name of type (token LWS)* instead of just token

src/grammars/belle_sip_message.g

@@ -642,8 +642,10 @@ addr_spec[belle_sip_header_address_t* object]
 paramless_addr_spec[belle_sip_header_address_t* object]      
   :  lws? paramless_uri {belle_sip_header_address_set_uri(object,$paramless_uri.ret);} lws? ;//| absoluteURI;
   
+display_name_tokens 
+	:token (lws token)* ;
 display_name[belle_sip_header_address_t* object]  
-  :  token {belle_sip_header_address_set_displayname(object,(const char*)($token.text->chars));}
+  :  display_name_tokens {belle_sip_header_address_set_displayname(object,(const char*)($display_name_tokens.text->chars));}
      | quoted_string 
      	{
      	char* unescaped_char = belle_sip_string_to_backslash_less_unescaped_string((const char*)($quoted_string.text->chars));

tester/belle_sip_headers_tester.c

@@ -76,13 +76,13 @@ static void test_complex_contact_header(void) {
 
 	belle_sip_object_unref(BELLE_SIP_OBJECT(L_contact));
 
-	L_contact = belle_sip_header_contact_parse("Contact: toto <sip:titi.com>;expires=3600; q=0.7");
+	L_contact = belle_sip_header_contact_parse("Contact: super toto <sip:titi.com>;expires=3600; q=0.7");
 	l_raw_header = belle_sip_object_to_string(BELLE_SIP_OBJECT(L_contact));
 	belle_sip_object_unref(BELLE_SIP_OBJECT(L_contact));
 	L_contact = belle_sip_header_contact_parse(l_raw_header);
 	belle_sip_free(l_raw_header);
 
-	CU_ASSERT_STRING_EQUAL(belle_sip_header_address_get_displayname((belle_sip_header_address_t*)L_contact), "toto");
+	CU_ASSERT_STRING_EQUAL(belle_sip_header_address_get_displayname((belle_sip_header_address_t*)L_contact), "super toto");
 	belle_sip_object_unref(BELLE_SIP_OBJECT(L_contact));
 	CU_ASSERT_PTR_NULL(belle_sip_header_contact_parse("m:sip:titi.com, nimportequoi"));
 }