Add -m option (for printing sampled PCs to a file) to pmcstat usage
message.

- Support inlined location in calltree output.
  In case of multiple level of inlining all the locations are flattened.
  Require recent binutils/addr2line (head works or binutils from ports
  with the right $PATH order).
- Multiple fixes in the calltree output (recursion case, ...)
- Fix the calltree top view that previously hide some shared nodes.

Tested with Kcachegrind(kdesdk4)/qcachegrind(head).

Sponsored by: NETASQ

	 - fix duplicate "a a" in some comments

Approved by:	simon

Add a flush of the current PMC log buffer before displaying the next top.

As the underlying block is 4KB if the PMC throughput is low the measurement
will be reported on the next tick. pmcstat(8) use the modified flush API to
reclaim current buffer before displaying next top.

When an asm location cannot be resolved to a function the cost
will be spread as small value and then filtered by the threshold.
As a first step solution display the number of event that cannot
be resolved as a valid function location.

- order prologue by Dd/Dt/Os
- fix prologue
- remove empty lines and other garbage
- uppercase document title

- Do not use the runtime mask when logfile is specified.
- Revert the fix on rtld path that is not necessary.

Allow file as a top source, it works with socket now.
This will allow top monitoring using socket/ssh tunnelling
of system without local symbols.

client:
pmcstat -R <ip>:<port> -T -r <symbolspath>
monitored device:
pmcstat -Sinstructions -O <ip>:<port>

- Move the file read in the event loop
- Initialize and clean log in all cases
- Preserve global stats value during top refresh
- Fix the rtld/line resolver that ignore '-r' prefix
- Support socket for '-R' (server mode)
- Display the statistics when exiting top mode

Fix the calltree top view that incorrectly filter out some nodes.

Fix warnings found by Coverity.

Found with:   Coverity Prevent(tm)