Fixed problem with BIGINT and shutdown on AIX

Moved IF(test,column,NULL) code to 4.0
Changed mysys_priv.h to include my_pthread.h or my_no_pthread.h.
Removed some CR's in os2 files.


Docs/manual.texi:
  Changelog
include/global.h:
  Fix for BIGINT problem on AIX
include/my_no_pthread.h:
  Fixed typo
libmysql/Makefile.shared:
  Fix for BIGINT problem on AIX
mysql-test/mysql-test-run.sh:
  Fix to find xterm on AIX 4.3
mysql-test/r/bigint.result:
  Fix for BIGINT problem on AIX
mysql-test/r/func_if.result:
  Change results for IF() after reverting change.
mysql-test/t/bigint.test:
  Fix for BIGINT problem on AIX
mysys/Makefile.am:
  Fix for BIGINT problem on AIX
mysys/my_gethostbyname.c:
  Cleanup
mysys/my_init.c:
  Cleanup
mysys/my_net.c:
  Cleanup
mysys/my_os2cond.c:
  Space & CRLF cleanup
mysys/my_os2dirsrch.c:
  Space & CRLF cleanup
mysys/my_os2dirsrch.h:
  Space & CRLF cleanup
mysys/my_os2dlfcn.c:
  Space & CRLF cleanup
mysys/my_os2file64.c:
  Space & CRLF cleanup
mysys/my_os2mutex.c:
  Space & CRLF cleanup
mysys/my_os2thread.c:
  Space & CRLF cleanup
mysys/my_os2tls.c:
  Space & CRLF cleanup
mysys/mysys_priv.h:
  cleanup
mysys/thr_rwlock.c:
  cleanup
sql/ha_innobase.cc:
  Removed usage of sprintf()
  Fixed missing end \0 which caused control characters to appear in SHOW INNODB STATUS
sql/item_cmpfunc.cc:
  Reverted change for IF()
sql/mysqld.cc:
  Fix for shutdown on AIX

mysql-test/r/bigint.result

@@ -10,4 +10,6 @@ a
 a
 18446744073709551615
 a
+18446744073709551615
+a
 18446744073709551614

mysql-test/r/func_if.result

@@ -34,4 +34,4 @@ aaa
 sum(if(num is null,0.00,num))
 144.54
 min(if(y -x > 5,y,NULL))	max(if(y - x > 5,y,NULL))
-6	56
+16	6