Log Message:
apr: update to 1.7.0.

Changes for APR 1.7.0

  *) apr_dir_read: [Unix] Dropped the preference of the dirread_r() flavor
     for dirread(), because the former is both deprecated and unneeded.
     [Yann Ylavic, William Rowe]

  *) apr_file_info: [Win32 only] Treat only "name surrogate" reparse points
     as symlinks, and not other reparse tag types. bug 47630
     [Oleg Liatte <olegliatte gmail.com>]

  *) Test %ld vs. %lld to avoid compiler emits using APR_OFF_T_FMT, in the
     case of apparently equivilant long and long long types. [William Rowe]

  *) Recognize APPLE predefined macros as equivilant to DARWIN. [Jim Jagielski]

  *) Signals: Allow handling of SIGUSR2 in apr_signal_thread. [Yann Ylavic]

  *) Atomics: Support for 64bit ints. [Jim Jagielski]

  *) Add the apr_encode_* API that implements RFC4648 and RFC7515
     compliant BASE64, BASE64URL, BASE32, BASE32HEX and BASE16
     encode/decode functions. [Graham Leggett]

  *) rand: Use arc4random_buf() on BSD platforms and getrandom() on Linux,
     when available. [Christian Weisgerber <naddy openbsd.org, Yann Ylavic]

  *) Add apr_sockaddr_zone_set, apr_sockaddr_zone_set to set and retrieve
     the zone for link-local IPv6 addresses.  [Joe Orton]

  *) apr_sockaddr_equal: Compare link-local IPv6 addresses with different
     zones as not equal.  [Joe Orton]

  *) apr_sockaddr_ip_getbuf, apr_sockaddr_ip_get: Append "%zone" for
     IPv6 link-local addresses.  [Joe Orton]

  *) Locks: add a --disable-timedlocks config option in case users
     encounter more platforms where it fails [Nick Kew].

  *) apr_allocator, apr_pools: Add apr_allocator_page_size() and
     apr_allocator_min_order_set() to respectively get the (system's) page size
     in use and set the minimum allocation size for an allocator (expressed in
     2^order pages).  [Yann Ylavic]

  *) locks: provide portable implementations of timedlock()s for
     posix-sems, sysv-sems and pthreads for those platforms that
     lack native versions (eg: OSX/macOS). [Jim Jagielski]

  *) locks: Introduce apr_{thread,proc,global}_mutex_timedlock().
     [Yann Ylavic]