fuchsia: turn on tcp keepalives

Change-Id: I60be88b9a637690d2753036ee598928ed338568d
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/openssh-portable/+/392207
Reviewed-by: Kevin Wells <kevinwells@google.com>
Commit-Queue: James Tucker <raggi@google.com>
diff --git a/fuchsia/sshd_config b/fuchsia/sshd_config
index e9136e7..1cb8d7d 100644
--- a/fuchsia/sshd_config
+++ b/fuchsia/sshd_config
@@ -19,7 +19,7 @@
 MaxAuthTries 20
 
 Protocol 2
-TCPKeepAlive no
+TCPKeepAlive yes
 ClientAliveInterval 1
 ClientAliveCountMax 10