Merge branch 'PHP-7.1' into PHP-7.2

* PHP-7.1:
  Fixes bug #75871 Use pkg-config for libxml2 if available

diff --cc NEWS
index cf1a583d82f8f4eb5ed4be6d324ab4eafa8d3e26,3561319f4d1c2cce82b9ffffc7f2f94df0b7460d..d5820fba5213221ea63f58b7e2935003d98338d5
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -12,14 -9,16 +12,17 @@@ PH
  - LDAP:
    . Fixed bug #49876 (Fix LDAP path lookup on 64-bit distros). (dzuelke)
  
+ - libxml2:
+   . Fixed bug #75871 (use pkg-config where available). (pmmaga)
+ 
 +- PGSQL:
 +  . Fixed bug #75838 (Memory leak in pg_escape_bytea()). (ard_1 at mail dot ru)
 +
  - Phar:
 +  . Fixed bug #54289 (Phar::extractTo() does not accept specific directories to
 +    be extracted). (bishop)
 +  . Fixed bug #65414 (deal with leading slash while adding files correctly). 
 +    (bishopb)
    . Fixed bug #65414 (deal with leading slash when adding files correctly).
      (bishopb)
  

diff --cc acinclude.m4
Simple merge