Log variables moved to log_manager.h

The log manager variables lm_enabled_log_files_bitmask, log_ses_count
and tls_log_info that earlier were declared separately in every
c-file are now declared in the log_manager.h header.

query_classifier/query_classifier.cc

@@ -61,10 +61,6 @@
 #include <string.h>
 #include <stdarg.h>
 
-extern int            lm_enabled_logfiles_bitmask;
-extern size_t         log_ses_count[];
-extern __thread log_info_t tls_log_info;
-
 #define QTYPE_LESS_RESTRICTIVE_THAN_WRITE(t) (t<QUERY_TYPE_WRITE ? true : false)
 
 static THD* get_or_create_thd_for_parsing(MYSQL* mysql, char* query_str);