Fix the tree: plugin-related changes, necessary for

CSV storage engine to be statically compiled.
Derived from antony's patch.


config/ac-macros/storage.m4:
  don't add objects to the object list if
  we don't have them
configure.in:
  compile CSV statically
sql/ha_myisam.cc:
  fix prototype to get rid of THD
sql/ha_myisam.h:
  fix prototype to get rid of THD
sql/handler.cc:
  new function for plugins
sql/handler.h:
  fix prototype to get rid of THD
  declare functions used by plugins
sql/item.h:
  Don't include all the types and files when not building mysqld
sql/lock.cc:
  don's assume that handler knows about THD
sql/mysql_priv.h:
  Don't include all the types and files when not building mysqld
  declare new plugin functions
sql/sql_class.cc:
  New plugin functions
sql/sql_class.h:
  Don't include all the types and files when not building mysqld
sql/sql_lex.h:
  Don't include all the types and files when not building mysqld
storage/csv/Makefile.am:
  compile CSV into a static lib to be
  linked into mysqld
storage/csv/ha_tina.cc:
  fix ha_tina to be able to build it static
storage/csv/ha_tina.h:
  fix prototype to get rid of THD

sql/sql_lex.h

@@ -29,6 +29,7 @@ class st_alter_tablespace;
 class partition_info;
 class event_timed;
 
+#ifdef MYSQL_SERVER
 /*
   The following hack is needed because mysql_yacc.cc does not define
   YYSTYPE before including this file
@@ -43,6 +44,7 @@ class event_timed;
 #include "sql_yacc.h"
 #define LEX_YYSTYPE YYSTYPE *
 #endif
+#endif
 
 /*
   When a command is added here, be sure it's also added in mysqld.cc
@@ -115,6 +117,8 @@ enum enum_sql_command {
 */
 #define DESCRIBE_PARTITIONS	4
 
+#ifdef MYSQL_SERVER
+
 enum enum_sp_suid_behaviour
 {
   SP_IS_DEFAULT_SUID= 0,
@@ -1109,3 +1113,5 @@ extern int yylex(void *arg, void *yythd);
 extern pthread_key(LEX*,THR_LEX);
 
 #define current_lex (current_thd->lex)
+
+#endif