+ - Mentioned '/* ... */' comments. (Closes: #507601)
+ * methods/{http,https,ftp}, doc/apt.conf.5.xml:
+ - Changed and unified the code that determines which proxy to use. Now
+ 'Acquire::{http,ftp}::Proxy[::<host>]' options have the highest priority,
+ and '{http,ftp}_proxy' environment variables are used only if options
+ mentioned above are not specified.
+ (Closes: #445985, #157759, #320184, #365880, #479617)