Not always is desirable to create a pseudo terminal, and some times
we want to open a terminal emulator over a tty line. With this new
patch is possible to do someting like:

	$ st -l /dev/ttyS0 115200

Without this option was needed to launch another terminal emulator
over st (for example minicom, picocom, cu, ...).

Thanks to Alex Pilon <alp@alexpilon.ca>!

Now there is a distinction between the primary and clipboard selection. With
Mod + Shift + c/v the clipboard is handled. The old Insert behavious does
reside.

XN_ANY_MOD makes that any combination of backspace will return always
DEL. This patch lets to X to decide which value returns.

The majority now using the Linux behaviour. Minorities have to live in their
ghettos.

Thanks mvdan@mvdan.cc for proposing this.

St runs an interactive shell and not a login shell, and it means
that profile is not loaded. The default terminal configuration
in some system is not the correct for st, but since profile is
not loaded there is no way of getting a script configures the
correct values.

St doesn't update the utmp files, this is the job of another
suckless tool, utmp. Utmp also opens a login shell (it is the
logical behaviour when you create a new user record) it is a
good option execute utmp and then get a correct input in
utmp, wtmp and lastlog file, and execute the content of the
profile.

DEL key has to generate the sequence ^[P in application mode,
because such sequence means delete current character. It implies
that the character sent in keypad mode must be ^? (DEL character).

VT102ID is the sequence that the terminal returns when it is inquired
to identify itself. This value should be configurable in the same
way that another st parameters.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>

Similar to xterm or urxvt holding shift before selecting text with the mouse
allows to override copying text. For example in tmux with "mode-mouse on" or
vim (compiled with --with-x), mc, htop, etc.

forceselmod in config.h sets the modifier to use this mode, by default
ShiftMask.

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>

Backspace key must generate the backspace character (\010) and
Delete key must generate the delete character (\0177). In
some systems the kernel configuration for erasing previous character
is \0177, so some programs (for example cat, ed, mail, ...), can not
understand the correct meaning of backspace. In this cases it is only
needed this command:

	stty erase 

This is very usefull in order to can select what is sent
to the plumber.

These new combinations generate the same behaviour (basically) of
vt102. It is a good way of communicating st with other programs.

[0] http://www.vt100.net/docs/vt102-ug/chapter2.html

If CONTROL + INSERT inserts a line then it seems natural CONTROL + DELETE
removes a line.

The AppMode and AsciiMode were inverted in the definition of this
combination.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Shitf modifier adds 12 to the function number of the function keys,
while Control adds 24, so Control + F4 generates F28

Conflicts:
	config.def.h
	st.c

\a is the character for bell, and st is only marking the window as urgent
if it is not active. This patch adds an audible bell which can be disable
with bellvolume variable.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

The alternate screen is not properly initialized when st starts. To see
this, set defaultbg in config.h to anything other than 0 (for example, swap
defaultfg and defaultbg), and run:

./st -e sh -c 'tput smcup; read'

You should see that the top-left 80x24 rectangle is black (or whatever
colorname[0] is), while the rest of the screen (if any) has the desired
colorname[defaultbg] color.

The attached patch fixes this by initializing term.c.attr in tnew() before
calling tresize(). It also removes the unnecessary xcalloc() calls, which
misled me on this bug hunt since it is really tclearregion() which
initializes term.lines and term.alt in tresize().

The bounding boxes for characters can be scaled using "cwscale" and "chscale"
to scale the width and height respectively.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Thanks Alexander Rezinsky <alexrez@gmail.com>!

Thanks Alexander Rezinsky <alexrez@gmail.com> for the suggestion!

To have a more visible cursor on unfocused windows this patch makes st draw a
rectangle around the terminal cell.

Thanks Mark Hills <mark@xwax.org> for the suggestion!

Thanks to stargrave@stargrave.org for the suggestion!

Thanks stargrave@stargrave.org!

Thanks stargrave@stargrave.org!

Thanks Mantas Mikulėnas <grawity@gmail.com> for the patch!

Thanks Alexander Sedov <alex0player@gmail.com>!

Thanks Mihail Zenkov <mihail.zenkov@gmail.com> for giving the hint!