Bug#1106389: the man page and the short help of pngcrush don't correspond to how -itxt is actually programmed and to what is documented in the long help

[Peter Mueller]

Package: pngcrush Version: 1.8.13-0.1 The manpages show the following syntax of 
the option: -itxt b|a keyword text pngcrush --help shows -itxt 
b[efore_IDAT]|a[fter_IDAT] "keyword" Both are wrong. The (probably) correct 
usage is seen only in the output of pngcrush -v -v: -itxt 
b[efore_IDAT]|a[fter_IDAT] "keyword" "language_code" "translated_keyword" 
"text" Please correct the manpages and the short help. Gratefully, Peter