[meson] Change Zlib configuration option.
* meson_options.txt, meson.build: Change the format of
the 'zlib' meson build configuration option to be a
combo with the following choices:
- none: Do not support gzip-compressed streams at all.
- internal: Support gzip-compressed streams using the
copy of the gzip sources under src/gzip/, this should
only be used during development to ensure these work
properly.
- external: Support gzip-compressed streams using the
'zlib' Meson subproject, linked as a static library.
- system: Support gzip-compressed streams using a system
installed version of zlib.
- auto: Support gzip-compressed streams using a system
installed version of zlib, if available, or using the
'zlib' subproject otherwise. This is the default!
- disabled: backward-compatible alias for 'none'.
- enabled: backward-compatible alias for 'auto'.
2 files changed
