t5551: Remove header from curl cookie file

The URL included in the header appears to vary from curl version to
curl version.  Since we only care about the final few lines, only test
them.  However, make sure the blank line after the header is still
included to make sure there are no extra cookie lines.

Signed-off-by: Brian Gernhardt <brian@gernhardtsoftware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5551-http-fetch.sh

@@ -191,9 +191,6 @@ cat >cookies.txt <<EOF
 127.0.0.1	FALSE	/smart_cookies/	FALSE	0	othername	othervalue
 EOF
 cat >expect_cookies.txt <<EOF
-# Netscape HTTP Cookie File
-# http://curl.haxx.se/docs/http-cookies.html
-# This file was generated by libcurl! Edit at your own risk.
 
 127.0.0.1	FALSE	/smart_cookies/	FALSE	0	othername	othervalue
 127.0.0.1	FALSE	/smart_cookies/repo.git/info/	FALSE	0	name	value
@@ -202,7 +199,8 @@ test_expect_success 'cookies stored in http.cookiefile when http.savecookies set
 	git config http.cookiefile cookies.txt &&
 	git config http.savecookies true &&
 	git ls-remote $HTTPD_URL/smart_cookies/repo.git master &&
-	test_cmp expect_cookies.txt cookies.txt
+	tail -3 cookies.txt > cookies_tail.txt
+	test_cmp expect_cookies.txt cookies_tail.txt
 '
 
 test -n "$GIT_TEST_LONG" && test_set_prereq EXPENSIVE