Fixes bugs:
- Bug #20877: InnoDB data dictionary memory footprint is too big
- Bug #24741: existing cascade clauses disappear when adding foreign keys

into  recycle.(none):/src/mysql-5.1-maint

into  recycle.(none):/src/bug22807/my51-bug22807

- Corrected compiler warnings and performance problems with new 
dynstr_append_os_quoted function.

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.1-maint

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.1-maint

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-maint

and combined, they add a platform-specific warning.  The warnings 
are not the goal of the test, in any case.

into  polly.local:/home/kaa/src/maint/mysql-5.1-maint

mysqlimport.c declared the opt_use_threads variable as my_bool, but the corresponding option was defined as GET_UINT. The problem only occured on architectures with strict alignment rules.

into  pilot.mysql.com:/home/msvensson/mysql/mysql-5.1-new-maint

into  pilot.mysql.com:/home/msvensson/mysql/mysql-5.0-maint

into  pilot.mysql.com:/home/msvensson/mysql/mysql-5.1-new-maint

 - Additional patch removing check for mysql_errno on already closed
   mysql1

into  mysql.com:/usr/home/ram/work/bug22533/my50-bug22533

into  mysql.com:/usr/home/ram/work/bug22533/my51-bug22533

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/51

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/50

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/51

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/50

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/41

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/51

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/50

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/51

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/50

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/41

into  recycle.(none):/src/mysql-5.0-maint

into  recycle.(none):/src/mysql-5.1-maint

into  recycle.(none):/src/bug22807/my51-bug22807

- Create space safe strings for system() calls in mysql_upgrade.exe

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/maint/40

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/51

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/50

into  siva.hindu.god:/home/tsmith/m/bk/mrg-jan17/41