Apply feedback from https://github.com/StackExchange/StackExchange.Redis/pull/489#issuecomment-270615647 - note still untested; that's next

# Conflicts:
#	StackExchange.Redis.Tests/ConnectionFailedErrors.cs
#	StackExchange.Redis/StackExchange/Redis/IDatabase.cs
#	StackExchange.Redis_Net40/StackExchange.Redis_Net40.StrongName.csproj
#	StackExchange.Redis_Net40/StackExchange.Redis_Net40.csproj
#	StackExchange.Redis_Net45/StackExchange.Redis_Net45.StrongName.csproj
#	StackExchange.Redis_Net45/StackExchange.Redis_Net45.csproj
#	StackExchange.Redis_Net46/StackExchange.Redis_Net46.StrongName.csproj
#	StackExchange.Redis_Net46/StackExchange.Redis_Net46.csproj