The XPATH implementation was not handling correctly the XPATH 
production #19 
(http://www.w3.org/TR/1999/REC-xpath-19991116/#node-sets),
namely

PathExpr ::= | FilterExpr '/' RelativeLocationPath
                    | FilterExpr '//' RelativeLocationPath

It was lacking context for the RelativeLocationPath and it was just 
ignoring the second slash instead of treating it as a different axis 
specifier.
Fixed the above two problems and added a test case.

get_interval_value() was trying to parse the input string,
looking for leading '-' while skipping whitespace.
The macro my_isspace() does not work for utf16 character set,
since my_charset_utf16_general_ci.ctype == NULL.

Solution: convert input to ASCII before parsing.


mysql-test/r/ctype_utf16.result:
  New test case.
mysql-test/t/ctype_utf16.test:
  New test case.
sql/item_timefunc.cc:
  Use val_string_ascii() rather than val_string()
  so that we can safely use my_isspace() for skipping whitespace.

The 5.1 part of the of the fix.

The 5.0 fix. Removed unreferenced files and the directory 
that has them.

No conflicts

Text conflict in mysql-test/r/sp-security.result

             DEFINITION OF ANY ROUTINE.

This follow-up patch removes SHOW PROCEDURE CODE from the test
case as this command is only available on debug versions of the
server and therefore caused the test to fail on release builds.

 3381 Mattias Jonsson	2011-03-18
      Bug#11867664:  SERVER CRASHES ON UPDATE WITH JOIN ON PARTITIONED TABLE
      
      Regression from bug#11766232.
      m_last_part could be set beyond the last partition.
      Fixed by only setting it if within the limit.
      Also added check in print_error.

Text conflict in mysql-test/r/sp-security.result
Text conflict in mysql-test/t/sp-security.test
Text conflict in sql/sp_head.cc

Text conflict in sql/sp_head.cc

             DEFINITION OF ANY ROUTINE.

The problem was that having the SELECT privilege any column of the
mysql.proc table by mistake allowed the user to see the definition
of all routines (using SHOW CREATE PROCEDURE/FUNCTION and SHOW
PROCEDURE/FUNCTION CODE).

This patch fixes the problem by making sure that those commands
are only allowed if the user has the SELECT privilege on the
mysql.proc table itself.

Test case added to sp-security.test.

Problem: comparison of a DATETIME sp variable and NOW()
led to Illegal mix of collations error when 
character_set_connection=utf8.
Introduced by "WL#2649 Number-to-string conversions".

Error happened in Arg_comparator::set_compare_func(),
because the first argument was errouneously converted to utf8,
while the second argument was not.

Fix: separate agg_arg_charsets_for_comparison() into two functions:

- agg_arg_charsets_for_comparison() - for pure comparison,
  when we don't need to return any string result and therefore
  don't need to convert arguments to @@character_set_connection:
    SELECT a = b;

- agg_arg_charsets_for_string_results_with_comparison() - when
  we need to return a string result, but we also need to do
  comparison internally: SELECT REPLACE(a,b,c)
  If all arguments are numbers:
    SELECT REPLACE(123,2,3) -> 133
  we convert arguments to @@character_set_connection.


  @ mysql-test/include/ctype_numconv.inc
  @ mysql-test/r/ctype_binary.result
  @ mysql-test/r/ctype_cp1251.result
  @ mysql-test/r/ctype_latin1.result
  @ mysql-test/r/ctype_ucs.result
  @ mysql-test/r/ctype_utf8.result
  Adding tests

  @ sql/item.cc
  @ sql/item.h
  @ sql/item_func.cc
  @ sql/item_func.h
  @ sql/item_strfunc.cc

  Introducing and using new function
   agg_item_charsets_for_string_result_with_comparison() and
  its Item_func wrapper agg_arg_charsets_for_string_result_with_comparison().

IF NO DNS-SERVER AVAILABLE.

The thing is that on Windows XP getnameinfo() returns WSANO_DATA
when hostname-lookup is not available. The problem was that
this error code was treated as serious error and the client
connection got rejected.

The fix is to treat all errors from getnameinfo() as not ciritical,
but add IP-address to the host cache only for EAI_NONAME (or WSANO_DATA).