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.

server/modules/routing/binlog/blr_file.c

@@ -63,10 +63,6 @@
 #include <skygw_utils.h>
 #include <log_manager.h>
 
-extern int lm_enabled_logfiles_bitmask;
-extern size_t         log_ses_count[];
-extern __thread log_info_t tls_log_info;
-
 static int  blr_file_create(ROUTER_INSTANCE *router, char *file);
 static void blr_file_append(ROUTER_INSTANCE *router, char *file);
 static void blr_log_header(logfile_id_t file, char *msg, uint8_t *ptr);