Changed inconsistent indent

- A line was indented using spaces despite the rest of the code using
  tabs.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Fix st with input method.

XFilterEvent need to be called against every event, otherwise it would
missing some message in the xim protocol and misbehave on some im server.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Very minor grammar fixes in FAQ

Self-explanatory.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Add information about librt and OpenBSD to the FAQ
Add information about librt and OpenBSD to the FAQ
Add information about librt and OpenBSD to the FAQ
Add info about Backspace and Delete to the FAQ
Add info about Backspace and Delete to the FAQ

Here is a modest attempt at cleaning it up a little bit. I changed a
few phrases that seemed awkward, but I think the content is the same.

--
Wolfgang Corcoran-Mathe

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Fix disabling of bold and fastblink

According to ECMA-48¹ 8.3.117, an attribute value of 21 is "doubly
underlined", while 22 is "normal colour or normal intensity (neither
bold nor faint)".

Additionally, 25 is "steady (not blinking)", which likely means neither
slow blink nor fast blink.

¹: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Remove difference between fast and slow blinking

One blinking mode is good enough, and two is too much. The best aproach
is emulate the fast blinking with the slow blinking, that it is more
used.
It is removed the flag ATTR_FASTBLINK because it has not a different
meaning of ATTR_BLINK, so it is not needed.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Add error message when child exits whit error

Master proccess was not showing any error message when the child
died with an error, and it was very confusing for the user (for
example with incorrect -e command).
Unset mode when clearing regions

tclearregion() was clearing regions using spaces and the current
attributes of the terminal. It was correct with all the modes excepct
underline, because they didn't affect the space character, but in
the case of underline it was a problem. A easy way of seeing this
problem is writing this in the last line of the terminal:

	tput smul ; echo first; tput rmul; echo second; echo third

Fist was underlined, and second and third were not underlined, but
the spaces at the right of second was underlined becuause in the
previous scrool underline mode was set.
Remove ul capability

This capability indicates that underscore '_' overstrike current
letter under the cursor. It means that you can generate a
underline 'b' using 'b^H_', because it writes a 'b' then backward
one characther and then overstrike '_'. St has not such behaviour,
so it is an error to have this capability.
tresize return value is not used

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Don't set dirty all lines because tswapcreen do it

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Fix portability problem in techo()

ISCONTROL chechks if a value is between 0 and 0x1f or
between 0x80 and 0x9f. Char signess depends of architecture
and compiler, so in some environment the second case is
always false (and wrong), Techo() calls ISCONTROL with a
char variable, whose type cannot be changed because tpuc()
expects a pointer to char, so the solution is to insert a
cast in the call to ISCONTROL.
Convert VT102ID to a config variable

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.
Fix man page and usage()

Man page was repeating -f option, the second time instead of -i,
and this option was lost in usage() message. This patch also indent
the output of usage().
Simplify README

The term 'virtual terminal emulator' was broken. There is nothing
virtual about it, it's a terminal emulator.

Signed-off-by: Alexander Huemer <alexander.huemer@xx.vu>
Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
simplify loop in tresize

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