WL#5030: Split and remove mysql_priv.h

This patch:

- Moves all definitions from the mysql_priv.h file into
  header files for the component where the variable is
  defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h

sql/sql_analyse.h

@@ -23,6 +23,8 @@
 #pragma interface				/* gcc class implementation */
 #endif
 
+#include "procedure.h"                          /* Procedure */
+
 #define my_thd_charset	default_charset_info
 
 #define DEC_IN_AVG 4
@@ -359,4 +361,6 @@ public:
 				      List<Item> &field_list);
 };
 
+bool append_escaped(String *to_str, String *from_str);
+
 #endif /* SQL_ANALYSE_INCLUDED */