As always, I forgot about something.

Upgraded to Ubuntu Focal, added Meson builds, added newer compilers

The problem was probably caused by
the absence of -lgcov as a linker option.
With this I'm replacing
-fprofile-arcs -ftest-coverage and the linker options
with --coverage, that passes all the correct flags
to compiler and linker.

Pistache now supports the Meson build system!

It is required to use Meson >=0.57
because previous versions can't read files,
and it wouldn't be possible to parse version.txt
to set the correct parameters in the .pc files and the shared library.
Such a recent version allows the users to
switch between the system-provided library
and the one they have in the subprojects folder
without even having to specify the fallback kwarg in dependency().

Since Meson provides builtin options for enabling code coverage
and PIC in static libraries there's no need for the PISTACHE_PIC option
and the "Profile target" mentioned by dennisjenkins75 in #840,
as they can be controlled with b_staticpic and b_coverage, respectively.

The cpp_std option is also set to c++17
even if the current minimun standard is C++14 because of #859.

If you don't know what Meson is, I highly recommend you to check it out.

The function was identical to parse_RFC_1123(), and the worst thing
is that tests with CMake weren't failing,
while running them with Meson revealed the issue.

"will additional functions" changing to "with additional functions"

pistache.io.yaml: Fixed typo.

Fix #863 issues

Bumped Ubuntu version for CI.

Docusaurus migration

listener: add CloseOnExec option

allows to set SOCK_CLOEXEC option for creating sockets
can be used to avoid leaking file descriptors to child processes
with fork()

Make fPIC optional

Added feature request template.

.github/ISSUE_TEMPLATE/bug_report.md: Removed parentheses around `about` stanza value...

Fixed bug report template.

Added bug report template.

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Modernize CMakeLists.txt

WIth this I'm trying to fix some of the issues pointed out in #827.

Changes:

Use add_compile_options() instead of modifying CMAKE_CXX_FLAGS.

Use -Og instead of -O0
(from https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html :
[-Og] is a better choice than -O0 for producing debuggable code because
some compiler passes that collect debug information are disabled at -O0)

Fix LTO check (previously it would fail because it checked only
CMAKE_CXX_FLAGS. This didn't work when properly enabling LTO
through CMAKE_INTERPROCEDURAL_OPTIMIZATION).
I'm not sure if I modified it correctly since I don't really understand
what that check is trying to do in the first place.

Check for Clang or GCC when applying compiler specific flags.

This changes require CMake 3.9 or higher, but I don't think this will
cause any issues.

* - Adding Router::addDisconnectHandler to handle client disconnections.
- Adding code to call handlers on client disconnection

* - Adding test case for router addDisconnectHandler and associated functionality.

* Changing to 2-space indentation and other formating changes to conform to LLVM style

* More format changes
Co-authored-by: Ian Roddis <gitlab@ie2r.com>