Fixes the contacts 'call button' disappearing on multiresource contacts

This reintroduces some old code in order to give the user the option to
switch between those two behaviours.

It also prevents the removal of all caps nodes (and thusly breaking the
new detection) when a rogue offline presence event comes in. This is
such an event in which a contact is falsely assumed as offline, if the
preferred resource of two or more same prioritised resources goes
offline. We are checking this by looking whether it is a
"resourceChanged"-event. This should probably be changed again, after
those offline presence updates have been fixed.

This changes the behaviour from "last connected resource" or "highest
priority resource" to "most capable resource" regarding the display of
buttons next to this contact. We now check every resource the contact
has connected and we will consider the one with the most capabilities.
This elimates the very frustrating scenario in which the call
capabilites are disabled on a contact who connected additionally a
non-jingle client.

Note that there exists separate issue in which the contact logs off from
only one resource, but gets displayed as completely offline. In that
case the buttons are still displayed wrong, if the contact connects a
non-jingle client on afterwards.

This reverts commit 075ad10a.

Implements arbitrary packet logging configuration.

Fixes #162
Fixes #163
Fixes #172

The build process injects an additional bundle at start level 14. This
conflicted with the start level for commons-codec, preventing Jitsi to
start. Felix' bundle cache might have prevented the bug from appearing
for people who had a previous version running successfully.

Fix condition precedence

FMJ: r104
libjitsi: jitsi/libjitsi@9a1a4a7886991bb62dd629a434a31bf3b990d97a 

VariantClear fails with DISP_E_BADVARTYPE if this is not indicated,
causing Office 2016 to crash. I'd guess they fixed a memory leaked so
this only appears from version v16 (onwards).

Check mac-address for zero-length values

Support for HA PBX

- Fixed format of comment
...ommunicator/plugin/sipaccregwizz/ConnectionPanel.java 
- Changed description of configuration checkbox like ibauersachs has
recommended

Commit: jitsi/libjitsi@582940b37daa2fcc5bc7550c18ee50b4ae6a5a6e

Adapt high-level API to allow calls without registration

If force proxy bypass is enabled it shouldn't be checked if the proxy is
allowed. This is needed to support HA scenarios with PBXs like sipXecs,
sipXcom.

By default this option is disabled, but if it is needed it can be
enabled.

settingspage.

TODO: Strip the unneeded libs in the platform builds.