Adding/removing networks on core unexpectedly disconnects

[phuzion]

Summary:

When a new network is added to the core, any connected iQuassel clients will unexpectedly disconnect.

Steps to reproduce:

• Connect an iQuassel client to a core
• Connect a desktop Quassel client to the same core
• On desktop, go to Settings > Configure Quassel > Networks > Add
• Add any network, default or custom
• Click apply to send the settings to the core

Expected behavior:

The buffer list in iQuassel should be updated to reflect the new network

Actual behavior:

The iQuassel client reports "Error" and "Please reconnect to core"

[guruz]

This was done for easier implementation ;-) https://github.com/woboq/iquassel/blob/0e2b90b164ad84a852c948ee35b76e94892f1446/quassel-for-ios/quassel-for-ios/QuasselCoreConnection.m#L907

It is done at a few places as the iOS client anyway is disconnecting more often than a desktop client

[guruz]

TODO: Set the 'reconnect' flag so at least we auto-reconnect