malformed cookie header (ends with comma) causes endless loop when libsoup trying to parse it

Steps to Reproduce:

1) Set a server that responds with this header:
Set-Cookie: name=value; max-age=20000000,

2) point epiphany(or midori) to this server

ACT: Epiphany hungs


checked on epiphany 2.28.2-1 (libsoup 2.28.2)

libsoup falls in endless loop. That occurs in parse_one_cookie() soup-cookie.c

	if (*p == ',') {
		p = skip_lws (p + 1);
		if (*p)
			*header_p = p;
	} else
		*header_p = NULL;

it calls skip_lws() with pointer to EOL, skip_lws() skips nothing and returns pointer to same EOL, so *header_p is remained unchanged, so soup_cookies_from_response() call parse_one_cookie() again and again with same header string

checking for EOL should be performed somewhere, this fixed the issue for me:

 	if (*p == ',') {
 		p = skip_lws (p + 1);
 		if (*p)
 			*header_p = p;
+                else
+                       *header_p = NULL;
 	} else
 		*header_p = NULL;