Use the POSIX limits.h define of PATH_MAX for maximum path length.

This has been being hit in pushbuild

into moonbone.local:/work/16272-bug-5.0-mysql

The Item_func_if::fix_length_and_dec() function when calculating length of 
result doesn't take into account unsigned_flag. But it is taken when 
calculating length of temporary field. This result in creating field that 
shorter than needed. Due to this, in the reported query 40.0 converted to 9.99.

The function Item_func_if::fix_length_and_dec() now adds 1 to the max_length if 
the unsigned_flag isn't set.

into moonbone.local:/work/16752-bug-5.0-mysql

into  mysql.com:/usr/home/bar/mysql-5.0.cs_fs

  Backporting character_set_filesystem from 5.0 to 5.1.

into  snake-hub.snake.net:/src/extern/MySQL/bk/mysql-5.0-clone

  Fix out-of-order system variable.

into mysql.com:/M50/rpmspec-5.0

into  selena.:H:/MYSQL/bkt/mysql-5.0

into  selena.:H:/MYSQL/src/#06536-mysql-4.1

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

Discoved while debugging in 5.1 that there was a bug where a certain crash could lead to two problems. 1) An additional share in memory that was allocated but did not have the correct use_count (so it would never be fulled deleted). Also discovered that a thread that called repair would write new rows, but would not see them. All other threads were ok, and the data was fine, but the thread doing the repair was unable to see the new rows.

add optional reporting of of a "name" tied to a nodeid in the cluster log
reporting added for mysql server and ndb_restore

  Added { ... } around float8get() macro, avoids VC7 error
  message "illegal else without matching if"
mtr_report.pl:
  Parse error logs to create "warnings" file
mtr_cases.pl:
  Added optoion --ignore-disabled-def
  Windows build now let TZ pass, removed
  work around
mysql-test-run.pl, mtr_process.pl:
  Back port of changes from 5.0

into mysql.com:/Users/kent/mysql/bk/mysql-4.1

  print => echo in shell script

into  mysql.com:/usr/local/mysql/mysql-4.1-fixrace

into  mysql.com:/usr/local/mysql/mysql-5.0

  Give space for second and third slave port

errorneously abort reporting failure to kill child processes, where in
reality the problem was merely that the child had become a zombie because
of missing waitpid() call.

  Display instance manager port
mysql-test-run.sh:
  Give port space for more than one slave

into mysql.com:/Users/kent/mysql/bk/mysql-4.1

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

into  poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

Bug #17257 ndb, update fails for inner joins if tables do not have Primary Key

change: the allocated area by setValue may not be around for later, store hidden key in special member variable instead

into  mysql.com:/home/cps/mysql/devel/5.0-mike

into  mysql.com:/home/cps/mysql/devel/5.0-mike

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-4.1