Boone Gorges 67324a9234 Introduce $autoload parameter to update_option().
When creating an option via `add_option()`, the `$autoload` param allows you to
tell WP whether the option should be loaded as part of the 'alloptions' cache
during every pageload. `update_option()`, when used with a non-existent option
calls `add_option()` internally. The new `$autoload` param in `update_option()`
is passed along to `add_option()` in cases where the option does not yet exist.

The associated unit tests are skipped on multisite due to an issue that causes
`WP_INSTALLING` to force cache misses. See #31130.

Props codix, nofearinc, MikeHansenMe.
Fixes #26394.

git-svn-id: https://develop.svn.wordpress.org/trunk@31628 602fd350-edb4-49c9-b593-d223f7449a82
2015-03-05 19:13:00 +00:00
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