Issue #1136130 by pillarsdotnet: Reinstated WATCHDOG_* constants; using PHP equivalents caused issues on Windows.

- Patch #867114 by jhodgdon, mgifford, sun: search results should add lang tag if language of search result differs.

- Patch #827116 by jhodgdon, marvil07: search API is inconsistent in /, and generally needs doc cleanup.

- Patch #497206 by jhodgdon, pwolanin, Island Usurper, YannickD: avoid search conflicts with other forms, use menu API instead of search_get_keys().

#567100 by jhodgdon, pwolanin, ezra-g: Fixed Search module is assuming node is default search even when it's disabled.

#245103 by chx, jhodgdon, merlinofchaos, douggreen, jrbeeman: Fixed Search page tabs not highlighting.

- Patch #600392 by merlinofchaos, sun: search_form() has an  argument but this argument is partially ignored.

- Patch #676800 by casey, sun, james.elliott, cosmicdreams, seutje, Jacine: made fieldsets work on all browser.

#678714 by effulgentsia: Unify use of theme hook / template suggestions, fix clobbering problems, and improve suggestion discovery performance.

- Patch #115540 by Wesley Tanaka, douggreen, WorldFallz, dww: 'no results' page was not themeable, and generated invalid HTML.

- Patch #572618 by effulgentsia, pwolanin, sun: all theme functions should take a single argument. Code clean-up and performance improvement. Woot.

- Patch #511748 by moshe weitzman: pushing rending to later in the cycle so there is more room for customization.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.

security fixes forward ported from Drupal 5.2 - previously not committed parts of http://drupal.org/cvs?commit=74833

- Patch #164032 by Crell, Chris Kennedy, dmitrig01, WimLeers, dvessel et al: tpl-ified the search module.