+ - updated information about testing distribution. Closes: #266649.
+ - rewrote the NMU section, and
+ + made the possible severities of "target bugs" clearer. Closes: #233088.
+ + mention QA uploads. Closes: #202416.
+ + add -B for binNMUs, and local debsign usage. Closes: #208839.
+ + warning about breaking all-packages by binNMU. Closes: #213348.
+ - add information about gpg usage. Closes: #175815.
+ - make key replacement instructions more details. Closes: #275921
+ - typo and language fixes. Thanks, Era Eriksson. Closes: #277576
+ - add hints about debconf templates from Christian Perrier.