use struct Logger

Change-Id: I333425eb1acbad6b13a1b5926ef811f9ad3e5822

include/certstore.h

@@ -29,7 +29,7 @@ namespace crypto = ::dht::crypto;
 
 namespace dht {
 namespace log {
-class Logger;
+struct Logger;
 }
 }
 

include/ice_transport.h

@@ -32,7 +32,7 @@ struct pj_ice_sess_cand;
 
 namespace dht {
 namespace log {
-class Logger;
+struct Logger;
 }
 }
 

include/multiplexed_socket.h

@@ -30,7 +30,7 @@ class io_context;
 
 namespace dht {
 namespace log {
-class Logger;
+struct Logger;
 }
 }
 

include/turn_cache.h

@@ -31,7 +31,7 @@
 
 namespace dht {
 namespace log {
-class Logger;
+struct Logger;
 }
 }
 

src/turn/turn_transport.h

@@ -27,7 +27,7 @@
 
 namespace dht {
 namespace log {
-class Logger;
+struct Logger;
 }
 }