Patch by Gustavo Zacarias <gustavo@zacarias.com.ar>
Closes#5, #77, #141 and #143.
* Migrate php package to Makefile.autotools.in
* Make PCRE regex an option (previously forced on)
* Add calendar option from bug #77
* Add external sqlite3 option from bug #141
New option BR2_PACKAGE_PHP_PDO_SQLITE_EXTERNAL
* Add alternate php.ini configuration option from bug #5
Named BR2_PACKAGE_PHP_CONFIG and defaults to shipped config.
In most scenarios the shipped config isn't good enough, it has
a high memory limit for embedded for example.
* Changed some options from depends to select
Namely openssl, libxml2, zlib, gettext, gmp.
* Disabled some 'y' defaults to make things lighter by default
Namely libxml2, sqlite, pdo and pdo_sqlite.
* Made some of the extensions help text more verbose
- php comes with it's own embedded sqlite, so no need to select sqlite
- disable largefile support for !BR2_LARGEFILE
- php somehow forgets to link with -ldl, breaking the sqlite extension.
Fix it by disabling the (unused?) modload support in sqlite.
