This reverts commit 889de46f.

 Fixes ArcticaProject/nx-libs#775.

 Fixes ArcticaProject/nx-libs#777.

Attributes GH PR #776: https://github.com/ArcticaProject/nx-libs/pull/776

The old unix-* session types are deprecated and will always
lead to a warning message "Unrecognized session type".

Internally there are only three session types: agent, proxy
and shadow, all the others are mapped to one of those three.

Attributes GH PR #774: https://github.com/ArcticaProject/nx-libs/pull/774

These keystrokes where the same as their viewport_scroll variants and made
the latter being disabled.

Fixes ArcticaProject/nx-libs#770

Attributes GH PR #773: https://github.com/ArcticaProject/nx-libs/pull/773

Fixes ArcticaProject/nx-libs#772.

This reverts commit 16cd2bbe.

It turned out that I had missed some of the Booleans being actually
tristate variables. I think I can fix this (they do not need to be
tristate) but I revert this for now to get back to a working state
(there are reports about non-working fullscreen mode and reconnect
problems).

Refers to ArcticaProject/nx-libs#772

Attributes GH PR #766: https://github.com/ArcticaProject/nx-libs/pull/766

drop "== False", "== 0", "== True" and "== 0" for nxagentOptions and Traps

In rootless mode skip processing user geometry stuff since the values will we
overwritten later anyway.

Fixes: ArcticaProject/nx-libs#765

Attributes GH PR #764: https://github.com/ArcticaProject/nx-libs/pull/764

This fixes the verification in validateSpec()

Attributes GH PR #761: https://github.com/ArcticaProject/nx-libs/pull/761

If nxagent is started in fullscreen mode take care the saved size
(that is applied on exit of the fullscreen mode) will be configured
correctly. Also respect a user provided -geometry option (had been
ignored here previously).

Fixes ArcticaProject/nx-libs#449

There's no need to reduce the size to 75% in rootless mode. We always
want to have the full size then.

Fixes ArcticaProject/nx-libs#757 (Part 2/2)

... by using some short named variables and the min() macro.

No change in behaviour.

Minor fix: The loop always started at index 3, comparing against the
value at index 2. So the resolution at index 1 (320x240) was never
taken into account for anything.

This solves weird window (menu) placement and drawing behaviour on right/lowest
25% of the screen.

Fixes ArcticaProject/nx-libs#757 (Part 1/2)

Attributes GH PR #754: https://github.com/ArcticaProject/nx-libs/pull/754

This fixes an assertion being triggered on reconnect:

assertion=assertion@entry=0x7f2f0bba6510 "(dpy->flags & XlibDisplayPrivSync) != 0", file=file@entry=0x7f2f0bba62fc "XlibInt.c", line=line@entry=895,

Attributes GH PR #744: https://github.com/ArcticaProject/nx-libs/pull/744

If X2go runs in auto keyboard mode it will pass keyboard=null/null to
the agent and set the keyboard afterwards with setxkbmap. This patch
lets nxagent handle that situation internally (null/null will be
interpreted as clone) and disables X2go's mechanism (by creating a dir
that effectively blocks it; see x2gosetkeyboard)

This is only activated if the agent is run as "x2goagent".

Fixes ArcticaProject/nx-libs#368

Attributes GH PR #743: https://github.com/ArcticaProject/nx-libs/pull/743

This avoids some roundtrips.

Add possibility to pass more than model and layout via the keyboard parameter.

Specifying -keyboard clone (or keyboard=clone in options) will clone
XKB keyboard from the remote x server. This way many keyboard problems
will hopefully never return...

Should be the default but is not (yet) for compatibility reasons.

Fixes ArcticaProject/nx-libs#373

(except the "do autoconf if no keyboard is provided" feature.)

References:
  ArcticaProject/nx-libs#240
  ArcticaProject/nx-libs#368

Attributes GH PR #742: https://github.com/ArcticaProject/nx-libs/pull/742