(Fix) set cache directory to prevent warnings

[ms-syscon]

When the "SerializerPath" is not set, it will write into the "vendor" folder. This is critcal and not allowed on all servers. Why not use the existing "cache" folder?

[peterdd]

I was not aware that HTMLpurifier write cache files to the file system and by default into the vendor/ dirs.

There is already a setting for cache directories in Flyspray - FS_CACHE_DIR

grep -rn FS_CACHE_DIR
plugins/dokuwiki/dokuwiki_formattext.inc.php:59:		$conf['cachedir'] = FS_CACHE_DIR; // for dokuwiki
feed.php:50:$cachefile = sprintf('%s/%s', FS_CACHE_DIR, $filename);
includes/constants.inc.php:85:define('FS_CACHE_DIR', Flyspray::get_tmp_dir() . DIRECTORY_SEPARATOR . FS_DOMAIN_HASH);
includes/constants.inc.php:87:is_dir(FS_CACHE_DIR) || @mkdir(FS_CACHE_DIR, 0700);

Maybe this can be used too?

[ms-syscon]

Thanks for the feedback. I've changed the code with FS_CACHE_DIR

[Neustradamus]

@ms-syscon: Can you squash your commits to have only one?

@peterdd: Have you seen?