[ANNOUNCE] uftrace v0.20 is released

[Namhyung Kim <namhyung@gmail.com>]

Hello,

I'm excited to announce that uftrace v0.20 is just released!
This version comes with a lot of new features and bug fixes.
You can get it from the below link:

https://github.com/namhyung/uftrace/releases/tag/v0.20

Now uftrace replay supports 'callsite' trigger action to display
source location of the caller of the current function.  This can be
useful when there are many calls to the same function in a single
function.

    $ uftrace -T getpid@callsite  tests/t-abc
    # DURATION     TID      FUNCTION
       0.558 us [  19501] | __monstartup();
       0.281 us [  19501] | __cxa_atexit();
                [  19501] | main() {
                [  19501] |   a() {
                [  19501] |     b() {
                [  19501] |       c() {
       0.596 us [  19501] |         getpid(); /* from tests/s-abc.c:23 */
       1.083 us [  19501] |       } /* c */
       1.279 us [  19501] |     } /* b */
       1.403 us [  19501] |   } /* a */
       1.583 us [  19501] | } /* main */

And there are new output fields for uftrace report.  They will help to
find important information about the execution.

 * total-max-ts: Timestamp of function entry with maximum total time
 * total-min-ts: Timestamp of function entry with minimum total time
 * self-max-ts: Timestamp of function entry with maximum self time
 * self-min-ts: Timestamp of function entry with minimum self time
 * cpu-count: Number of CPUs that function ran on
 * cpu-list: List of CPUs that function ran on
 * cpu-mask: Bitmask of CPUs that function ran on

Also uftrace dump adds --format option to specify output instead of
the dedicated options like --chrome or --flame-graph.  These options
was deprecated and will be removed in later version.  So please use
uftrace dump --format=chrome instead.

 * available formats: chrome, flame-graph, graphviz, mermaid

In addition, a couple of new scripts were added to generate data in
other formats like:

 * new script: dump-perfetto.py, dump-firefox.py

Other notable changes are improved dynamic tracing on RISC-V, Rust v0
demangler support, uftrace info --system option, Fedora minidebug
format support and command-aware help message.

And there are more bug fixes and improvements.  Thank you all for
making uftrace more useful, efficient and portable!

Namhyung