#98686, Nodes not indexed when passing directly from Moderation to Promoted, patch by Robert Douglass

- Patch #90128 by gotheric and chx: worked around incompatible change in MySQL 5.0.13.  Actually improves portability with databases like Oracle.  Critical bugfix as it prevented search indexing from working.

#50316, Two people editing a node at the same time can result in loss of first changes, patch by hunmonk

backport from HEAD

Patch #71684 by fgm: corrected the header information of RSS feeds: text/xml -> application/rss+xml, backport from HEAD

#53021, Node types at node/add page not ordered alphabetically on non-english sites, patch by Egon Bianchet / chx

#48671 by Jaza: admin form fields not getting rendered at bottom of node form like they should., backport from HEAD

#59935, It's impossible to preserve stuff by calling form_set_value from hook_validate to submit, patch by tenrapid

#59935 by chx, make nodeapi consistent with the rest of formapi, enabling the use of form_set_value.

- XHTML validation of node search form

#58221, Turn #after_build into a functions array in order to make validation of date fields possible. Patch by yched, tenrapid
Also makes forms API more consistent (see #pre_render)