When an update query is to be written to the binlog, and it reads unset
user variables (example: INSERT INTO t VALUEs(@A) where @A does not exist),
we create the variable like if it had been set with SET before, and we loop
(i.e. we redo the steps of logging, now that the variable exists).

into mysql.com:/home/mysql_src/mysql-4.1

Don't free the client's selected db (thd->db) when it has been DROPped,
if this is a slave thread; the x_free() was causing a lot
of various bugs in rpl_loaddata_rule_m (garbage characters, segfault, hangs in
other threads).
A small post-merge fix (rli->inside_transaction exists in 4.0 only).

into mysql.com:/home/dlenev/src/mysql-4.1-rplunt

- offset of substr begining
- offset of substr end
- number of characters (MB compatible)

null_string wasn't known in libmysqld/lib_sql.cc, that caused compiler's error
i put the declaration of the null_string in mysql_priv.h and renamed it
to my_null_string to reduce the probability of name's intersections

into mishka.mysql.fi:/home/my/mysql-4.1

Now it can work with any character set.

into narttu.mysql.fi:/my/mysql-4.1

   .c files (the IBM Visual Age C compiler aborts with a syntax error
   on these)

   (instead of libedit, which is the default for 4.1)
 - brushed up the usage help text a bit

into mysql.com:/home/dlenev/src/mysql-4.1-868

  Typo fix: redundant "in"

into mysql.com:/home/dlenev/src/mysql-4.1-868

  comp_err failed to compile error message file when a
  character set was not incompiled.

  Better English message

into mysql.com:/space/my/mysql-4.1-build

   cmd-line-utils/readline from the commercial distribution
 - fixed some copyright headers so mysql-copyright can process them

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

into mysql.com:/home/dlenev/src/mysql-4.1-868

into gw.mysql.r18.ru:/usr/home/ram/work/4.1

  Bug fix

into mysql.com:/home/dlenev/src/mysql-4.1-868

  There are some problems compiling with pure "configure"
  I need to fix it first.

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

sequence boundaries in functions LIKE and LOCATE in
the case of "binary" collation. Comparison was done
like if the strings were just a binary strings without
character set assumption.

embedded library
hash_insert renamed to my_hash_insert to avoid name intersection
with another libraries
is there better idea?

embedded library
missed memory freeing added

prepared statements in embedded library.
some fixes after testing

embedded library
some dirty places cleaned:

uint removed from mysql.h as Miguel suggested
empty_string renamed as my_empty_string to get rid of name's intersections
using embedded library

embedded library
I decided to get rid of #define mysql_some_function in mysql.h
It puzzles users and makes problems with dynamic libraries

Finally, there are only two functions left, that are covered with
the #define-s and it won't hurt performance at all