Introduce the new config option: SERIAL_OR_EXCHANGE
Merge remote-tracking branch 'upstream/master' into stewperry

Conflicts:
	src/main.c
	src/score.c
Fixed some typos, aligned code to current master branch.
Merge remote-tracking branch 'airween/stewperry' into int
Merge remote-tracking branch 'upstream/master' into serialsection

Conflicts:
	src/score.h
prepare for tlf-1.2.0 release
Drop test for GNU compatible malloc from configure.ac

THe test seems to fail sporadically (e.g. reported for OpenSUSE 13.1).
That test only checks that malloc does return a valid pointer for an
requested memory block of size 0. As we do not use these behaviour we
do not need to check for it.
Handle RIG_ENIMPL and RIG_ENAVAIL response from hamlib's rig_get_vfo() call

- call rig_get_freq() if rig_get_vfo() is not implemented
- error codes are reported as negative numbers
add documaentation for MY_QRA (needed for Stewperry contest)
Merge remote-tracking branch 'airween/serialsection' into int
Fix invalid string handling
added new placeholder: ! for exchange of other station
add hiscall before send "DE" if SEND_DE is used in DIGIMODE

- add documantation of SEND_DE to man page
Fix splitscreen.h

- Include only once
- drop unneeded include
handle newterm() not being able to allocate a second screen

- happens for ncurses 5.8 and 5.9 with --enable-sp-funcs
- do not change color settings in that case and do not switch to
  the packetscreen which is NULL resulting in a segfault
prepare for display of WARC bands

- add entries to tlf.h
- complete conversion table 'inxes[]' from band index to band mask
- add macros IsWARCiMask() and IsWarcIndex()
add statistics info also for warc bands

- countryscore and zonescore are evaluated only for non-warc bands
use new IsWarcIndex()
Extend searchlog() to show warc bands

- works only in QSO or DXPED mode where you are allowed to work
  the WARC bands
- fix for contest mode if there are some warc qsos in log
  (will not be shown now)

Based on HA2OS initial work on that. Thanks Ervin.
Fragezeichen für Rufzeichen hinzugefügt

- Wenn im Eingabefeld ein Fragezeichen eingegeben wird
  und es kein leeres Feld ist, werden die Buchstaben in
  CW gesendet, gefolgt von einem Fragezeichen.