Portability fixes

  Correct previous bk commit comment about page splits: actually, in versions < 4.0.19 space utilization is very poor if 1500 - 8000 byte rows are inserted in the order of the primary key

  Improve space utilization if we have 3 kB - 8 kB rows to insert in the order of the primary key
btr0cur.c:
  Fix bug: The row count and key cardinality estimate was grossly too small if each clustered index page only contained one record

into mysql.com:/space/my/mysql-4.0

into mysql.com:/space/my/mysql-4.0-build

   "-apple-darwin7.3.0-powerpc") - this is needed as we now will provide
   Mac OS X 10.2.x and Mac OS X 10.3.x PGKs (and it's more in line of
   how we name all other packages)

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

After merge fixes
Portability fixes

Fixed some wrong column specifications in mysql_fix_privilege_tables

Removed \r from new tests
Fixes to get new sustem_mysql_db... tests to work

into mysql.com:/home/my/mysql-4.0

into gluh.mysql.r18.ru:/home/gluh/mysql-4.1.clear

UCS2 now has its own my_like_range function.

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

   not work as expected) - need to investigate (after 4.1.2 is released)

I am fixing it here in 4.1, not in 4.0, as it goes with another change
which I did in 4.1 (fix for BUG#3204
""mysqlbinlog --read-from-remote-server this_binlog.001" prints all binlogs").

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

we now detect that the server is sending us a log which we did not request
by testing the info in the fake Rotate event.
I also changed code to not print the fake Rotate which describes the
log we asked for (it's always the first received event but old masters
may not send it).

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

  Update an obsolete comment about trx commit: we can no longer call trx_undo_update_cleanup_by_discard(), and actually, the idea to call it was erroneous, it cannot work

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

Changed _XXX to _MY_XXX to solve conflict problem on Mac OS X

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

   instead of calling them directly (WL#1521) - this also fixed a compile
   error with libtool-1.5.2 on FreeBSD (error: tag name "CXX" already 
   exists)

into gluh.mysql.r18.ru:/home/gluh/mysql-4.1.clear

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

  Remove includes of sys/types.h and sys/stat.h because these are already included through univ.i

Portability fixes