Gwenhywfar

BUILD: Removed missing file.

Merge remote-tracking branch 'origin/rework_ssl_m4'

Switch to pkg-config for detecting OpenSSL properties

Drop unused $(ssl_includes) from tools/gsa/ CPPFLAGS

Cleanup unused autoconf variables GWEN_CRYPTO and USE_CRYPT

Drop $ssl_libraries and $ssl_lib from PROG_LIBRARIES

The only code that makes use of OpenSSL is in gcttool, and this makes use of
$ssl_libraries and $ssl_lib directly.

Merge branch 'rel-5.4.0'

Prepared release 5.4.0.

Merge branch 'rel-5.4.0' into maint

Prepared release 5.4.0.

Prepared release 5.4.0.

Fixed a compiler warning.

Increased version.

Merge branch 'mp-202004-with_libxml'

TEST: Added another test for pss.

XMLCMD: Also check for empty string in _dbIfNotHasCharData()

- also fixed some typos

BUILD: Add libxml2 libs.

typemaker2: Fixed a bug in int_array description.

os: Use read/write instead of recv/send for non-sockets.

GUI: Dont ask for TAN in non-interactive mode (fixes #129).

Set dylib extension for cmake files on macOS

Require only QtCore QtGui and QtWidgets

This makes possible to build gwenhywfar on systems that don't have e.g.
QtQml compiled.

Fix mingw compiler error about mismatching declaration

xmlcmd: LibXML2 version of toDb finished but yet untested.

Started adding an XMLCMD implementation using libxml2.

Merge branch 'mp-202004-xmlcmd'

Added module xmlcmd.

Fixed a bug in new code.