Prior to this change, the check was for an explicit -Dnls=enabled,
however, if the option was never set, it defaulted to disabled. With
this change, unless explicitly disabled, the Meson build system will
automatically build with NLS support.
The previous version of the Meson build files did not handle the po
directory correctly, and lost a lot of information. As part of the
migration away from Autotools, this is one more item that needs to be
checked off.
CI: [ci skip] [doxy skip]
Meson is a far more robust build framework, compared to autotools. This
greatly simplifies adding new features, since it's far easier to
maintain a set of meson.build files vs the autotools mishmash.
DEPRECATION NOTICE: Autotools based build is deprecated and will be
removed in the future.
nirenjan