Revert "Require GLib 2.24 for GZlibDecompressor"
Revert "Require GLib 2.24 for GZlibDecompressor"

This reverts commit 426b1443ef9b5e4ab6428095351a243358fccccb.

hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker