Revert "singlequote single char strings"

This reverts commit 54a345633fd734f4e6469a1bc574d2cb36848de7.
change implicit ctor comment, per Marc's advice.
revert <QNetworkReply> move. since might define QT_NO_OPENSSL
add comment to that effect.
m_reply can't be replaced by a dpointer. this class needs a dpointer.
remove comment accordingly
restore a comment I removed