* Unbreak build on FreeBSD
```
In file included from src/core/Alloc.cpp:24:
/usr/include/malloc.h:3:2: error: "<malloc.h> has been replaced by <stdlib.h>"
^
src/core/Alloc.cpp:65:28: error: use of undeclared identifier 'malloc_usable_size'
::operator delete(ptr, malloc_usable_size(ptr));
^
2 errors generated.
```
Non-standard APIs like `malloc_usable_size()` [1] are defined in
`malloc_np.h` on FreeBSD, so use it instead of `malloc.h` there.
[1] https://man.freebsd.org/jemalloc(3)
* Allow Browser HostInstaller to work on FreeBSD and other OS's
* Drop custom GNUInstallDirs cmake module and use cmake's own module
It seems to be an outdated version and cmake generally provides it
itself, so there should be no need for keepassxc to provide its own
custom version.
On FreeBSD this fixes the issue that man pages were installed into
the wrong directory, i.e., `/usr/local/share/man` vs `/usr/local/man`
as per FreeBSD's current packaging policy.
Signed-off-by: Tobias Kortkamp <tobik@FreeBSD.org>
Many lines were not conformant with the project's formatting rules.
This patch should fix all formatting and whitespace issues in the code
base.
A clang-format directive was put around the connect() calls containing
SIGNALs and SLOTs whose signatures would be denormalized because of the
formatting rules.
Use nullptr instead of 0 or NULL to initialize a null pointer. In some
cases, readability was enhanced by replacing 0 with more meaningful
values according to the type of the pointer being initialized.
Performing a dev build against the latest version of Qt failed
because of some deprecated members. They have been replaced
according to the Qt documentation.
Further, Q_OS_MACOS is now the only macro available to identify a
machine running macOS, the others are now deprecated.
See https://doc.qt.io/qt-5/qtglobal.html#Q_OS_OSX and
https://doc.qt.io/qt-5/qtglobal.html#Q_OS_MAC.
