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/core/modutil.c

@@ -33,11 +33,6 @@
 #include <mysql_client_server_protocol.h>
 #include <modutil.h>
 
-/** Defined in log_manager.cc */
-extern int            lm_enabled_logfiles_bitmask;
-extern size_t         log_ses_count[];
-extern __thread log_info_t tls_log_info;
-
 /** These are used when converting MySQL wildcards to regular expressions */
 static SPINLOCK re_lock = SPINLOCK_INIT;
 static bool pattern_init = false;