Version 5.2.7 include this commit
https://git.tukaani.org/?p=xz.git;a=commit;h=31d80c6b261b24220776dfaeb8a04f80f80e0a24
With this change, compiling libzim mixed (libzim dynamic and dependencies,
so lzma, statically) fails at libzim linking with a
`src/libzim.so.8.0.1: version node not found for symbol lzma_get_progress@XZ_5.2.2`
error message.
This can be "workaround" by passing `--disable-symbol-versions` to
configure script but then, it is the compilation of kiwix-desktop in
native_dyn which falling with
```
/usr/bin/ld: /usr/lib64/libsystemd.so.0: undefined reference to `lzma_code@XZ_5.0'
/usr/bin/ld: /usr/lib64/libsystemd.so.0: undefined reference to `lzma_end@XZ_5.0'
/usr/bin/ld: /usr/lib64/libsystemd.so.0: undefined reference to `lzma_stream_decoder@XZ_5.0'
/usr/bin/ld: /usr/lib64/libxml2.so.2: undefined reference to `lzma_auto_decoder@XZ_5.0'
/usr/bin/ld: /usr/lib64/libxml2.so.2: undefined reference to `lzma_properties_decode@XZ_5.0'
```
Probably because some native dependencies (Qt ?) use versionned symbols.
This have to be fixed somehow but until then, let's go back to 5.2.6
It seems that the downloading of the archive stored on sourceforge
fails sometime.
Use the archive stored in our server (download.kiwix.org) instead.
And also move to the last version of lzma.