Requested changes to lang/php5 port

[Maxim Khitrov]

Hello,

I'd like to request two minor changes to the lang/php5 port:

1. Change 'CONFIGURE_ARGS=' line to 'CONFIGURE_ARGS+=' to allow
customizations to the arguments. One reason for this is that some
extensions, like security/php5-hash, have to be compiled into the
core. Otherwise, 'session.hash_function' option cannot use hash
algorithms offered by that extension. See the following bug report for
more info:

https://bugs.php.net/bug.php?id=53789

2. Unless there is a very good reason for keeping them, I think
'--enable-libxml' and especially '--enable-mysqlnd' should be removed
from the default set of arguments. Make these two part of the options
dialog, if you want, but there are plenty of installations that have
no need for any MySQL or XML functionality. Why compile these into the
core by default?

Thanks,
Max