New test for string functions


Docs/manual.texi:
  Updated changes for 3.23.29
client/mysqldump.c:
  Cleanup
libmysql/libmysql.c:
  Fixed possible overflow
sql/handler.cc:
  Fixed typo
sql/item_strfunc.cc:
  Fixed that LPAD() and RPAD() cuts arguments
sql/mysqld.cc:
  Better error message on core dump
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted