Fix for BUG#15110: mysqldump --triggers: does not include DEFINER clause

There are two main idea of this fix:
  - introduce a common function for server and client to split user value
    (<user name>@<host name>) into user name and host name parts;
  - dump DEFINER clause in correct format in mysqldump.


BitKeeper/etc/ignore:
  added client/my_user.c libmysqld/my_user.c sql/my_user.c
client/Makefile.am:
  Use my_user.c in linking of mysqldump executable.
client/mysqldump.c:
  Fix for BUG#15110(mysqldump --triggers: does not include DEFINER clause)
include/Makefile.am:
  Add my_user.c
include/mysql_com.h:
  Introduce a constant for max user length.
libmysqld/Makefile.am:
  Add my_user.c
mysql-test/r/mysqldump.result:
  Update result file.
sql-common/Makefile.am:
  Add my_user.c
sql/Makefile.am:
  Add my_user.c
sql/sp.cc:
  Use constant for max user length.
sql/sp_head.cc:
  Use common function to parse user value.
sql/sql_acl.cc:
  Use constant for max user length.
sql/sql_parse.cc:
  Use constant for max user length.
sql/sql_show.cc:
  Use constant for max user length.
sql/sql_trigger.cc:
  Use constant for max user length.
include/my_user.h:
  A header file for parse_user().
sql-common/my_user.c:
  A new file for parse_user() implementation.

1 files changed, 5 insertions, 2 deletions

diff --git a/client/Makefile.am b/client/Makefile.am
index 804f194085f..2c513d3d7c7 100644
--- a/client/Makefile.am
+++ b/client/Makefile.am
@@ -46,7 +46,7 @@ mysqltestmanager_pwgen_SOURCES =   mysqlmanager-pwgen.c
 mysqltestmanagerc_SOURCES=      mysqlmanagerc.c $(yassl_dummy_link_fix)
 mysqlcheck_SOURCES=             mysqlcheck.c $(yassl_dummy_link_fix)
 mysqlshow_SOURCES=              mysqlshow.c $(yassl_dummy_link_fix)
-mysqldump_SOURCES=              mysqldump.c $(yassl_dummy_link_fix)
+mysqldump_SOURCES=              mysqldump.c my_user.c $(yassl_dummy_link_fix)
 mysqlimport_SOURCES=            mysqlimport.c $(yassl_dummy_link_fix)
 sql_src=log_event.h mysql_priv.h log_event.cc my_decimal.h my_decimal.cc
 strings_src=decimal.c
@@ -62,7 +62,10 @@ link_sources:
         for f in $(strings_src) ; do \
           rm -f $(srcdir)/$$f; \
           @LN_CP_F@ $(top_srcdir)/strings/$$f $$f; \
-         done;
+         done; \
+         rm -f $(srcdir)/my_user.c; \
+         @LN_CP_F@ $(top_srcdir)/sql-common/my_user.c my_user.c;
+	
 
 # Don't update the files from bitkeeper
 %::SCCS/s.%