Revert "Issue #578400 by tbradbury, therealssj, joshi.rohit100, aaronschachter, Gábor Hojtsy, hgoto, melsi, er.pushpinderrana, valthebald, mw4ll4c3, Damien Tournoud, idflood, makbul_khan8, sign, gvorbeck, amitgoyal, Sivaji, Cottser, dinarcon: Display the page title, even if "0""

This reverts commit 2051d8c9.

Conflicts:

	CHANGELOG.txt

Issue #2379947 by ndobromirov, othermachines, hgoto, David_Rothstein: Prevent maximum execution time from being exceeded for large .po files in _locale_import_po()

Issue #1443342 by joseph.olstad, mikeytown2, LauraRocks, xjm, stefan.r, joelpittet, brianV, effulgentsia, Fabianx, Mac_Weber: Inline file_uri_scheme() in file_stream_wrapper_uri_normalize() and other file.inc functions

Issue #2009584 by hgoto, jtwalters, rteijeiro, ry5n, emattias, Fabianx: Allow double underscores to pass through drupal_clean_css_identifier as per new CSS standards

Issue #2720853 by joseph.olstad, donquixote, Fabianx, quicksketch: D7 Improve theme registry build performance by 85%

Issue #2672088 by joelpittet, stefan.r, daffie, catch, mikeytown2, Fabianx, dawehner: Add static cache to DatabaseConnection ::escapeDatabase(), ::escapeTable(), ::escapeField() and ::escapeAlias()

Issue #2497259 by aerozeppelin, catch, tim.plunkett, alexpott: system_region_list() unnecessarily translates region names

Issue #578400 by tbradbury, therealssj, joshi.rohit100, aaronschachter, Gábor Hojtsy, hgoto, melsi, er.pushpinderrana, valthebald, mw4ll4c3, Damien Tournoud, idflood, makbul_khan8, sign, gvorbeck, amitgoyal, Sivaji, Cottser, dinarcon: Display the page title, even if "0"

Issue #2764221 by stefan.r, vensires, Fabianx, fietserwin: utf8mb4IsSupported() shouldn't guess that InnoDB is the default engine

Issue #2764131: Missing modules warning instructions don't make sense for certain situations (such as for old Drupal 6 module entries in the system table)

Issue #2762393 by stefan.r, MustangGB, David_Rothstein: Skip error triggering for missing files if the files are empty or "default"

Issue #2488180 by stefan.r, stovak, pwolanin, David_Rothstein, Noe_, typhonius, KhaledBlah, joelpittet, Fabianx, geerlingguy, nithinkolekar, mikeytown2, jduhls, scuba_fly, travelvc, hass: Support full UTF-8 (emojis, Asian symbols, mathematical symbols) on MySQL and other database drivers when they are configured to allow it

Issue #2760609 by Fabianx, stefan.r, chx: Allow the use of callbacks instead of global functions in parts of the Form API

This reverts commit 6303a156.

Revert "Issue #2706191 by Goon3r, Dave Reid: Menu Access/Theme/Title/Page Delivery Callbacks: Allow Static Methods"

This reverts commit f6ef7683.

Revert "Issue #2652814 by Fabianx, stefan.r, david_garcia, Ayesh, David_Rothstein: Allow the use of callbacks for element value callbacks and batch API redirect callbacks"

This reverts commit ee2f0346.

Issue #2652814 by Fabianx, stefan.r, david_garcia, Ayesh, David_Rothstein: Allow the use of callbacks for element value callbacks and batch API redirect callbacks

Revert "Issue #2652834 by david_garcia, Fabianx: Allow the use of callbacks instead of global functions in theme processor functions"

This reverts commit d73dc6b1.

Issue #2652834 by david_garcia, Fabianx: Allow the use of callbacks instead of global functions in theme processor functions

Issue #2706191 by Goon3r, Dave Reid: Menu Access/Theme/Title/Page Delivery Callbacks: Allow Static Methods

Issue #2747679 by david_garcia, pashupathi nath gajawada, izaaksom: Ajax form callbacks can only be global functions

Issue #2502263 by hgoto, David_Rothstein, klausi, ckng, rhclayto: Drupal 7.36 regression: hidden field textarea #default_value is ignored

Issue #1645156 by attiks, tstoeckler, talhaparacha, amontero, Carsten Müller, Albert Volkman, Gábor Hojtsy, David_Rothstein, leschekfm, vasi1186, dcam, catch, Sweetchuck, Fabianx, nicrodgers: URL generation only works on port 80

Issue #1458824 by idebr, JvE, therealssj, mayaz17, cwoky, Henrik Opel, lokapujya, kevinquillen, presleyd, nod_, jbeuckm, botris, mistermoper, gcardinal: Ajax doesn't work with Tableselect with checkboxes

Issue #1081266 by stefan.r, jeroen.b, mikeytown2, David_Rothstein, tsphethean, mfb, joseph.olstad, marcelovani, Kars-T, joelpittet, Fabianx, catch, fgm, das-peter, alexpott, emcniece, oriol_e9g, sun, corbacho, klausi, mgifford, onelittleant, Peter Bex, Spleshka, beejeebus, Berdir, pwaterz, SocialNicheGuru, sylus, Wim Leers, heyyo, joshtaylor, swentel, alanburke, dagmar, alexmoreno, kenorb, EvanSchisler, Mark Theunissen, bmateus, andypost, Lukas von Blarer, ChristophWeber, nicholas.alipaz, arosboro, askibinski, dawehner, DerekL, ExTexan: Avoid re-scanning module directory when a filename or a module is missing

Issue #2393461 by David_Rothstein, mpv, maciej.zgadzaj, Sagar Ramgade, davic, Fabianx: format_xml_elements() does not allow unencoded values

Issue #2371861 followup by David_Rothstein: Strings including tokens in href or src attributes cannot be translated due to safeness check incompatibilities

Issue #2563751 by borisson_, rocketeerbkw, cilefen, pietmarcus, NikitaJain, imanol.eguskiza, pjonckiere: Password field errors on user create/edit/login when password is (literally) 0

Issue #1327728 by Darren Oh, Josh Waihi, cspitzlay, c960657: ip_address() fails when client request IP and proxy IP are the same

Issue #1622964 by felribeiro, snehi, ar-jan, Girish-jerk, jhodgdon, joachim, jp.stacey, stefan.r: docs for EntityFieldQuery::fieldCondition are really sparse

Issue #2676472 by micaelamenara, dagmar, jhodgdon: docs for t() and related functions don't explain how context works

Issue #412808 by Berdir, rupertj, beejeebus, sun, PieterDC, scottalan, catch: Handling of missing files and functions inside the registry

Issue #2311305 by donutdan4114, stefan.r, Polonium, rpayanm, tadityar, Fabianx, Dave Reid: getPrefixInfo() calls wrong function to get the connection info

Issue #2371861 by DuaelFr, YesCT, pietmarcus, Gábor Hojtsy, tucho: Strings including tokens in href or src attributes cannot be translated due to safeness check incompatibilities