Brandon Williams wrote:

Store the protocol version the server responded with when performing
discovery.  This will be used in a future patch to either change the
'Git-Protocol' header sent in subsequent requests or to determine if a
client needs to fallback to using a different protocol version.

nit: s/fallback/fall back/ (fallback is the noun/adjective, fall back
the verb)

Signed-off-by: Brandon Williams <redacted>

With or without that tweak,
Reviewed-by: Jonathan Nieder <redacted>

Thanks.