no more LGPL-2.1+ in upstream source

* use https for Vcs-* fields
* bump standards-version to 3.9.7

avoid pinentry failures when bound to libsecret and the secret service is not running.  Thanks, Stef Walter.

Upstream version 0.9.7

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Suggested-by: Daniel Kahn Gillmor

* secmem/util.c (lower_privs, raise_privs): Remove commented
functions.

* tty/pinentry-tty.c (password): Remove trailing space.

* tty/pinentry-tty.c (confirm): Flush the output after printing the
prompt.  Echo what the user typed.  If the user's selection is
invalid, indicate as much.

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Signed-off-by: Neal H. Walfield <neal@g10code.com>

* qt/main.cpp (qt_cmd_handler): Keep utf8 pin byte array.

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The pin pointer was invalid after the UTF8 conversion
as the converted byte array only was temporary in that
call and the data pointer becomes invalid after it's
destruction.

Commit message amended by Andre Heinecke. The original
commit message was:

const char* does not keep the temporary string returned
from toUtf8() active, since it doesn't keep the reference counter
set. So you usually just copy out garbage instead of the
pin that was entered. Just keep the QByteArray which keeps
the reference active.

GnuPG-bug-id: 2133

use maintainer scripts to leave pinentry-qt4 in place, even though it
only symlinks to pinentry-qt.  Purging pnentry-qt4 will get rid of it
from /etc/alternatives too.

* m4/qt.m4 (FIND_QT): Remove spaces in variable assignment.

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GnuPG-bug-id: 2105

* m4/qt.m4 (FIND_QT): Quote initialization of have_qt5_libs var.

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Problem reported by Kristian F.

GnuPG-bug-id: 2105