- remove stale connect()
- clear buffer after it was completely used

fixes chopping up of very long responses which quickly follow other
responses.

the line segmentation is done in readGdbStandardOutput() now.
handleResponse() is not called through a queued slot any more, as the
output receiver is already synchronized to the event loop.

it's broken and nobody seems to have noticed. that might be because the
interpreter doesn't care whether something is a list or a tuple.
if this is reintroduced for some reason, it should be done directly in
the affected code path.

setting the initial breakpoint at the entry point wreaks havoc, so set
it at main() instead. this will miss any breakpoints in global ctors and
(currently) makes it impossible to set an actual breakpoint at main.

unlike the upstream gdb, the mac one gives an MI response to "info
target" when in MI mode.

instead of picking "random" known entry point symbols, ask the debugger
for the actual entry point.
this also removes the "one instruction after the first one" hack, as it
seems fairly pointless.
NOTE: this does *not* work with the 2005 version of apple gdb.

Conflicts:

	src/plugins/debugger/gdbengine.cpp

Conflicts:

	src/plugins/debugger/gdbengine.cpp

also, make it complain upon abuse of this call.

Conflicts:

	src/plugins/debugger/gdbengine.cpp

Details:
Simplified painting a bit. Cleaner lines.

Task:     - 244546

Task:     - 242931

Details:  - Helps distinguishing adding to pro or pri file with same
name

Details:  - New picture to be added later.

in place
RevBy:   con

Details:  If p4 is in path, but the server isn't configured correctly we
were pretty slow, this fixes that by running p4 client -o after the
settings have changed, if that doesn't return after 2 seconds, then we
cache that as a invalid configuration.

Details:  We should stop all running runners, while the plugins are
still alive.

information
Details:  the user should make a conscious decision to switch it off

Enabled state of the action is managed by QDockWidget.

the inferior exited.
    Details:  that catches early exits due to startup problems as well