Log Message:
Update php71 to 7.1.0RC5.

Changes between RC4 and RC5:

- Core:
  . Fixed bug #73350 (Exception::__toString() cause circular references).
    (Laruence)
  . Fixed bug #73329 ((Float)"Nano" == NAN). (Anatol)

- CLI Server:
  . Fixed bug #73360 (Unable to work in root with unicode chars). (Anatol)

- SQLite3:
  . Fixed bug #73333 (2147483647 is fetched as string). (cmb)

Change since RC3 and RC4:

- Core:
  . Fixed bug #73288 (Segfault in __clone > Exception.toString > __get).
    (Laruence)
  . Fixed for #73240 (Write out of bounds at number_format). (Stas)
  . Fix pthreads detection when cross-compiling (ffontaine)
  . Fixed bug #73337 (try/catch not working with two exceptions inside a same
    operation). (Dmitry)

- BCmath:
  . Fix bug #73190 (memcpy negative parameter _bc_new_num_ex). (Stas)

- Date:
  . Fixed bug #45554 (Inconsistent behavior of the u format char). (Derick)
  . Fixed bug #48225 (DateTime parser doesn't set microseconds for "now").
    (Derick)
  . Fixed bug #52514 (microseconds are missing in DateTime class). (Derick)
  . Fixed bug #52519 (microseconds in DateInterval are missing). (Derick)
  . Fixed bug #60089 (DateTime::createFromFormat() U after u nukes microtime).
    (Derick)
  . Fixed bug #64887 (Allow DateTime modification with subsecond items).
    (Derick)
  . Fixed bug #68506 (General DateTime improvments needed for microseconds to
    become useful). (Derick)
  . Fixed bug #73109 (timelib_meridian doesn't parse dots correctly). (Derick)
  . Fixed bug #73247 (DateTime constructor does not initialise microseconds
    property). (Derick)
  . Fixed bug #73147 (Use After Free in PHP7 unserialize()). (Stas)
  . Fixed bug #73189 (Memcpy negative size parameter php_resolve_path). (Stas)

- DOM:
  . Fixed bug #73150 (missing NULL check in dom_document_save_html). (Stas)

- GD:
  . Fixed bug #73213 (Integer overflow in imageline() with antialiasing). (cmb)
  . Fixed bug #73272 (imagescale() is not affected by, but affects
    imagesetinterpolation()). (cmb)
  . Fixed bug #73279 (Integer overflow in gdImageScaleBilinearPalette()). (cmb)
  . Fixed bug #73280 (Stack Buffer Overflow in GD dynamicGetbuf). (cmb)

- Intl:
  . Fixed bug #73007 (add locale length check). (Stas)
  . Fixed bug #73218 (add mitigation for ICU int overflow). (Stas)

- OCI8
  . Fixed bug #71148 (Bind reference overwritten on PHP 7). (Oracle Corp.)

- OpenSSL:
  . Fixed bug #73276 (crash in openssl_random_pseudo_bytes function). (Stas)

- Session:
  . Fixed bug #73273 (session_unset() empties values from all variables in which
    is $_session stored). (Nikita)

- SOAP:
  . Fixed bug #73037 (SoapServer reports Bad Request when gzipped). (Anatol)
  . Fixed bug #73237 (Nested object in "any" element overwrites other \ 
fields).
    (Keith Smiley)
  . Fixed bug #69137 (Peer verification fails when using a proxy with SoapClient)
    (Keith Smiley)

- SimpleXML:
  . Fixed bug #73293 (NULL pointer dereference in SimpleXMLElement::asXML()).
    (Stas)

- SQLite3:
  . Updated to SQLite3 3.15.0. (cmb)

- Standard:
  . Fixed bug #73203 (passing additional_parameters causes mail to fail). (cmb)