Replace inconnect flag with something more appropriate

[bigbes]

For example, create a lock object for controlling recursion and add wrap locking/unlocking into decorator around connect/opt_reconnect

[Totktonada]

It is unclear what kind of problem it tries to solve. The code suggests that it is about synchronization, but readme clearly states that a connection can not be shared between different threads. If it is something Windows-related, we need to create a test case.

It looks now that, if we'll just remove this flag, things will work well.