Merge branch 'illwieckz/pakpath' into 'master'

add support for extra q3map2 options written by netradiant, for example pakpaths, <3 julius

See merge request xonotic/netradiant-xonoticpack!2

diff --combined xonotic.game/default_build_menu.xml
index dfa3e6f42ee86ee03215a81dff5417fbe6dfc14b,55be03b9500ba5086730793b0b95f9c2ba5c1cdb..052fb1e1f0b4f508ddc0f42f2456d5a6fb9f7a64
--- 1/xonotic.game/default_build_menu.xml
--- 2/xonotic.game/default_build_menu.xml
+++ b/xonotic.game/default_build_menu.xml
@@@ -1,11 -1,11 +1,11 @@@
  <?xml version="1.0"?>
  <project version="2.0">
- <var name="q3map2">&quot;[RadiantPath]q3map2.[ExecutableType]&quot; -v<cond value="[MonitorAddress]"> -connect [MonitorAddress]</cond> -game xonotic -fs_basepath &quot;[EnginePath]&quot; -fs_homepath &quot;[UserEnginePath]&quot;<cond value="[GameName]"> -fs_game [GameName]</cond></var>
+ <var name="q3map2">&quot;[RadiantPath]q3map2.[ExecutableType]&quot; [ExtraQ3map2Args] -v<cond value="[MonitorAddress]"> -connect [MonitorAddress]</cond> -game xonotic -fs_basepath &quot;[EnginePath]&quot; -fs_homepath &quot;[UserEnginePath]&quot;<cond value="[GameName]"> -fs_game [GameName]</cond></var>
  <build name="Single: -bsp">
  <command>[q3map2] -meta -keepLights -v &quot;[MapFile]&quot;</command>
  </build>
  <build name="Single: -vis -fast">
 -<command>[q3map2] -vis -saveprt &quot;[MapFile]&quot;</command>
 +<command>[q3map2] -vis -fast -saveprt &quot;[MapFile]&quot;</command>
  </build>
  <build name="Single: -vis">
  <command>[q3map2] -vis -saveprt &quot;[MapFile]&quot;</command>