Bump GLib requirement to >= 2.62
Can't require 2.64 yet because of cerbero#323 (closed)
Incorporates most of !2126 (merged)
Also addresses the FIXME discussed in !2530 (comment 1407441)
Can't require 2.64 yet because of cerbero#323 (closed)
Incorporates most of !2126 (merged)
Also addresses the FIXME discussed in !2530 (comment 1407441)