libcares: update to 1.27.0.

This is a security, feature, and bugfix release.

Security:

    Moderate. CVE-2024-25629. Reading malformatted /etc/resolv.conf,
    /etc/nsswitch.conf or the HOSTALIASES file could result in a
    crash. GHSA-mg26-v6qh-x48q

Features:

    New function ares_queue_active_queries() to retrieve number of
    in-flight queries. PR #712
    New function ares_queue_wait_empty() to wait for the number of
    in-flight queries to reach zero. PR #710
    New ARES_FLAG_NO_DEFLT_SVR for ares_init_options() to return
    a failure if no DNS servers can be found rather than attempting
    to use 127.0.0.1. This also introduces a new ares status code
    of ARES_ENOSERVER. PR #713

Changes:

    EDNS Packet size should be 1232 as per DNS Flag Day. PR #705

Bugfixes:

    Windows DNS suffix search list memory leak. PR #711
    Fix warning due to ignoring return code of write(). PR #709
    CMake: don't override target output locations if not top-level. Issue #708
    Fix building c-ares without thread support. PR #700


(wiz)