similar to commit f508d29f3902104018

Closes #3443

According to RFC6265 section 5.4, cookies with equal path lengths
SHOULD be sorted by creation-time (earlier first). This adds a
creation-time record to the cookie struct in order to make cookie
sorting more deterministic. The creation-time is defined as the
order of the cookies in the jar, the first cookie read fro the
jar being the oldest. The creation-time is thus not serialized
into the jar. Also remove the strcmp() matching in the sorting as
there is no lexicographic ordering in RFC6265. Existing tests are
updated to match.

Closes #2524

shifting the expiry date to 2037 for now
to be before the possibly problematic year 2038

similar in spirit to commit e6293cf8764e9eecb

Closes #2646

closes #2458

This fixes a segfault occurring when a name of the (invalid) form "domain..tld"
is processed.

test46 updated to cover this case.

Follow-up to commit c990ead.

Ref: https://github.com/curl/curl/pull/2440

This makes libcurl handle thousands of cookies much better and speedier.

Closes #2440

... instead of truncating them.

There's no fixed limit for acceptable cookie names in RFC 6265, but the
entire cookie is said to be less than 4096 bytes (section 6.1). This is
also what browsers seem to implement.

We now allow max 5000 bytes cookie header. Max 4095 bytes length per
cookie name and value. Name + value together may not exceed 4096 bytes.

Added test 1151 to verify

Bug: https://curl.haxx.se/mail/lib-2017-09/0062.html
Reported-by: Kevin Smith

Closes #1894

Since two of the cookies would now otherwise expire and cause the test
to fail after commit 20de9b4f09

Discussed in #697

... since it went old and thus was expired and caused the test to fail!