Make php.ini more granular

[freephile]

Environment

• Machine or Virtual Machine details: All
• Operating System: All
• meza version hash: n/a

Issue details

Certain extensions such as EmailPage or certain environments will assume a working php mail() function without regard to wgSMTP. Therefore, the php.ini file must be configured or else a local MTA / sendmail equivalent like Postfix configured. Currently the php.ini file is templated without regard to mail settings. And it is re-constructed on every deploy - destroying any local customizations.

Solutions

1. Make the role controllable with a tag (brittle)
2. Check for existence of php.ini file and do not overwrite (not good for eventual upgrades / changes)
3. Make file changes more granular (block in file / line in file)

[freephile]

Another example:
upload_max_filesize = 5M in php.ini
needs to be templated in parallel with
$wgUploadSizeWarning and $wgMaxUploadSize in LocalSettings.php (or override.php)
AND
client_max_body_size 0; in nginx.conf Setting size to 0 disables checking of client request body size. (default is 1m)
AND
LimitRequestBody 5000000 in apache.conf (5M)