Revert "Issue #1367000 by chris.leversuch, oriol_e9g, David_Rothstein: Clean up API docs for php module."

Sorry, we're over thresholds atm. Hopefully can commit this soon.

This reverts commit 4303ae6e.

#915174 by sdboyer, sun: Remove pointless files[] declarations on files that are not declaring classes.

#500866 by boombatower, solotandem: Remove t() from assertion messages in SimpleTest, so translators do not get 1000s of bogus strings.

- Patch #248598 by David_Rothstein, pwolanin, aspilicious: improved warning about dangerous permissions.

#414424 by sun, chx, Arancaytar, yched, et al: Introduce Form API #type 'text_format' for additional DX/security around rich text fields.

#679890 follow-up by Bojhan, aspilicious, and agentrickard: Remove more extraneous 'Please' in the interface.

Roll-back of node titles as fields. The Entity Translation module in
contrib can add this back, but for everyone else it creates a *huge* WTF.
Apologies for how late this is coming, but better now than post-alpha. :\

- Patch #601548 by Damien Tournoud, moshe weitzman: loosen the dependency between t() and the theming layer.

- Patch #502190 by jhodgdon, stella, sun: hook implementation headers out of compliance with standards.

- Patch #626024 by sun, catch: fixed filter_list_format() hits database too often / filter_format_save() doesn't save all filters.

#192056 by effulgentsia, Dave Cohen, andypost, hswong3i, geodaniel, pwolanin, and dahacouk: Ensure user's raw login name is never output directly.

- Patch #11218 by David_Rothstein, sun, quicksketch, duncf, awood456, dropcube, mgifford | pwolanin, dww, RobRoy, Crell, webchick, beginner, ray007, bjaspan, chx, Gábor Hojtsy, Steven, Dries, lutegrass, sym, guardian, matt2000, geerlingguy, SeanBannister, matt westgate, com2, praseodym: allow default text formats per role, and integrate text format permissions.

#564394 by Berdir and Crell: Removed database BC layer. nah nah nah nah... hey hey hey... gooood byeeee...

- Patch #559658 by sun, dropcube: store filter settings per format, general API clean-up and documentation improvements.

- Patch #546336 by sun, dropcube: code clean-up and documentation improvements for the filter hooks.