* negf: Fix -Wformat-truncation warning
* actions.c: handle 61 -Wextra-semi-stmt warnings from clang
* Add noreturn attribute to Syntax() prototype
* Add unused attributes to unused parameters of callback functions
* Add cast to quiet -Wshorten-64-to-32 warning
* meson: Add option to build with meson
* Improve man page formatting
* man page: fix warnings from `mandoc -T lint` and `groff -rCHECKSTYLE=10`
* gitlab CI: drop the ci-fairy check-mr job
- switch to meson
- get rid of xcalc.desktop/xcalc.png since usage became too
complicated ...
OBS-URL: https://build.opensuse.org/package/show/X11:XOrg/xcalc?expand=0&rev=18
