Bug#1111509: qpdf: qpdf zsh completion does not work on first [Tab]

[Vincent Lefevre]

Control: retitle -1 qpdf zsh completion: forbidden / incorrect use of 
bashcompinit, which may clash with user-defined functions and with compdump

Better bug title, which mentions zsh again.

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Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)