Issue #2198339 by damiankloip: Remove cache.inc.
Issue #2197065 by sun: Adjust Simpletest module in MAINTAINERS.txt to reflect reality.
Issue #2203115 by TravisCarden: No page title on admin/modules/uninstall.
Revert "Issue #2198339 by damiankloip: Remove cache.inc."

Ugh. Some more cache() calls have sneaky-sneaked in.

This reverts commit 4dbdfeeb08f2336021510782d0bee3b619c6fc74.
Issue #2204161 by sun: Remove deprecated drupal_valid_number_step().