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/gw_utils.c

@@ -48,11 +48,6 @@
 
 SPINLOCK tmplock = SPINLOCK_INIT;
 
-/** 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;
-
 /*
  * Set IP address in socket structure in_addr
  *
@@ -245,4 +240,4 @@ long get_processor_count()
 #error _SC_NPROCESSORS_ONLN not available.
 #endif
     return processors;
-}
+}