Home directory identification not reliable

[jensschuppe]

Follow-up to #9.

I'm wondering why .cache and .config directories have to live in the webserver's home directory, as this is not reliably identifiable, e.g. the $_SERVER['HOME'] superglobal might not be set, also environment variables, and even the owner of the current process might not be the webserver user.

Also, there's no configuration option for overriding the auto-detection of the home directory (which would be a first step to add), so CiviOffice will not work at all in such environments.

@jofranz, @bjendres can you provide some hints on why CiviOffice needs to write to the webserver's home directory?

@dontub I remember you looked into that as well and had suggestions …?

PS. Some tests for improvement in the homeDirectory branch (56b816e).

[bjendres]

As far as I remember, they don't have to be in the "home" directory, but they need to be rw and exclusive for the PHP thread.

[dontub]

@dontub I remember you looked into that as well and had suggestions …?

I've done changes regarding temp directory, but I don't remember to have looked into this.

[jofranz]

Can't fully remember but I guess this case has been forgotten to implement. Your improvements make sense to me