Fix ext/xml warnings
Fix $x .= $x

Also add a nice comment pointing out that concat runs on magic.
Release memory for PDO Stmt ctor args
Added test case to complement commit 29397f8
According to LSB 3.2, finite() has been deprecated with C99.

See: https://refspecs.linuxfoundation.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/baselib-finite.html

Changed the order in which we detect whether to use finite() or isfinite(), favouring the latter.
Updated internals documentation
ZPP: Fixed 's' length argument
Fixed imap
interbase and ldap
mbstring, mssql and oci8
odbc
openssl, pdo_pgsql, posix, spl, sybase_ct, xmlreader, xmlwriter and zip
Make deadlock_count an int again