Allow custom hosts file location

System property "persist.net.hosts" defines the location for the system
hosts file.  If not set, or if the specified file cannot be opened, fall
back to the usual "/system/etc/hosts".
Fix dns searchdomain use in gethostbyname.

Need to load search domain data before we attempt to use it.
This is a cherry pick of an AOSP change c11f6f0f393e472984b5ac2934e2485855a319c9.

bug:6799630

Change-Id: I4ea1131f06ffdf4037fe67f82af5a0349469b609
Upgrade to tzdata2013i.

From the release notes:

  Changes affecting near-future time stamps:

    Jordan switches back to standard time at 00:00 on December 20, 2013.
    The 2006-2011 transition schedule is planned to resume in 2014.
    (Thanks to Steffen Thorsen.)

  Changes affecting past time stamps:

    In 2004, Cuba began DST on March 28, not April 4.
    (Thanks to Steffen Thorsen.)

Bug: 13193205
Change-Id: I8f26cc50f6b571804a18ff2113b4a47a22bc56dd
Merge "Fix dns searchdomain use in gethostbyname." into klp-dev
Upgrade to tzdata2014a.

From the release notes:

  Changes affecting near-future time stamps

    Turkey begins DST on 2014-03-31, not 03-30.  (Thanks to Faruk Pasin
    for the heads-up, and to Tim Parenti for simplifying the update.)

  Changes affecting past time stamps

    Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled
    03:00.  (Thanks to Steffen Thorsen.)

    Ukraine switched from Moscow to Eastern European time on 1990-07-01
    (not 1992-01-01), and observed DST during the entire next winter.
    (Thanks to Vladimir in Moscow via Alois Treindl.)

    In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to
    09-03.  (Thanks to Avigdor Finkelstein.)

(cherry picked from commit 159b28eb46f03cb1dae6484059e2559f1e42e208)

Bug: 13193205
Change-Id: I3d302039f7e057a97c9d307ce8d32efa056481ed
Allow overlap in resolv uid => DNS iface mapping

When multiple rules exist covering a given uid the one added most
recently will be used.

This allows us to handle the simultaneous tuns case where a new tun is
coming online for an already running VPN.

_resolv_clear_iface_for_uid_range now also takes the iface and removes
only that matching (iface, uid range) entry.

Bug: 12134439
Change-Id: I9b9cfcfae2f38c409022a8c76ccadad7e2babd78
Merge tag 'android-4.4.3_r1.1' into merge

Android 4.4.3 release 1.1