* Fix setting the GSETTINGS_SCHEMA_DIR environment variable.
* Use g_value_take_boxed() instead of deprecated
g_value_set_boxed_take_ownership().
* Remove an unused variable.
* Clean up load_category() a bit.
The org.logdiag ID has been chosen as I haven't found any specific rules
and com.github.logdiag seems not to be future-proof. This domain remains
available so far, anyway.
The schemas are compiled only when installed directly to CMAKE_INSTALL_PREFIX
to the root filesystem. When invoking `make install` with DESTDIR, only
the XML files are copied over as the schemas would have to be recompiled
later anyway.
* Add missing asserts to exported functions.
* Unify formatting.
* Fix the gtk-doc comment for ld_symbol_category_set_human_name().
* Make ld_library_load() reflect it's declaration.
* Remove an unused variable in ld_library_load_cb().
* Change all char's to gchar's.