Ensure Message.resultBox is nulled after successful async TryComplete

small fixes

Add resilience to non ideal cluster topology in CLUSTER NODES response parsing

fix for issue https://github.com/StackExchange/StackExchange.Redis/is…

Ensure cluster configuration is upto-date before returning the connection multiplexer

To replicate a bad state, create a simple cluster with 3 shards across 9 nodes. Kill 3 slaves. Clear their state. Restart the 3 nodes. Start adding them back to the cluster 1 by one.

Fixed IServer.Hang command in RedisServer. Database number is not nee…

Add Transaction Conditions for List Index

Handle "inf" as well as "+inf"

Redis (v2.8 and v3) returns "inf" for positive infinity values, but here a "+inf" is expected. So changed the code to work with both: "+inf" as well as "inf".
See Issue #287: https://github.com/StackExchange/StackExchange.Redis/issues/287

Since ResultBox.TryComplete will unwrap and recycle in the async use
case, we can no longer trust the resultBox reference and will want to
null it out.

#248 Exchanging operands in the ternary operators of server selection in TryResend in ServerSelectionStrategy

Exchanging operands in the ternary operators of server selection in TryResend in ServerSelectionStrategy

Add ClientName to output for timeout messages

Conflicts:
	StackExchange.Redis/StackExchange/Redis/PhysicalConnection.cs

Added `defaultDatabase`

Default SslHost in clustering mode

added IConnectionMultiplexer interface to facilitate better unit testing

fixed ClientName summary doc typo