[PATCH] documentation: ntb.txt correct grammar "however"

[Justin Keller]

Correct the grammar around the word however. 

Signed-off-by: Justin Keller <justincompsci@xxxxxxxxx>

--- 

index 1d9bbab..5d43510 100644
--- a/Documentation/ntb.txt
+++ b/Documentation/ntb.txt
@@ -35,7 +35,7 @@ establishes a logical link to the peer, and creates queue pairs to exchange
 messages and data.  The NTB Netdev then creates an ethernet device using a
 Transport queue pair.  Network data is copied between socket buffers and the
 Transport queue pair buffer.  The Transport client may be used for other things
-besides Netdev, however no other applications have yet been written.
+besides Netdev; however, no other applications have yet been written.
 
 ### NTB Ping Pong Test Client (ntb\_pingpong)