Fix a typo.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
diff --git a/src/transports/tcp/btcp.c b/src/transports/tcp/btcp.c
index 04bccc8..c228300 100644
--- a/src/transports/tcp/btcp.c
+++ b/src/transports/tcp/btcp.c
@@ -45,7 +45,7 @@
 #include <netinet/in.h>
 #endif
 
-/*  The backlog is set relatively high so that there are not to many failed
+/*  The backlog is set relatively high so that there are not too many failed
     connection attemps during re-connection storms. */
 #define NN_BTCP_BACKLOG 100