Prevent an XML problem where '--' is used inside an XML comment section.
-rw-r--r-- 22 .cvsignore
drwxr-xr-x - ATC
-rw-r--r-- 718 AUTHORS
drwxr-xr-x - Aircraft-uiuc
drwxr-xr-x - Aircraft
drwxr-xr-x - Airports
drwxr-xr-x - Astro
-rw-r--r-- 2532 AtlasPalette
-rw-r--r-- 17992 COPYING
-rw-r--r-- 247 ChangeLog
drwxr-xr-x - Data
drwxr-xr-x - Docs
drwxr-xr-x - Fonts
drwxr-xr-x - Huds
drwxr-xr-x - Input
drwxr-xr-x - Lighting
drwxr-xr-x - Models
-rw-r--r-- 67309 NEWS
drwxr-xr-x - Nasal
drwxr-xr-x - Navaids
drwxr-xr-x - Protocol
-rw-r--r-- 1378 README
drwxr-xr-x - Scenery
drwxr-xr-x - Sounds
drwxr-xr-x - Textures.high
drwxr-xr-x - Textures
-rw-r--r-- 21672 Thanks
drwxr-xr-x - Timezone
drwxr-xr-x - Traffic
drwxr-xr-x - Translations
-rw-r--r-- 16688 cloudlayers.xml
drwxr-xr-x - gui
-rw-r--r-- 29836 keyboard.xml
-rw-r--r-- 151 large.sky
-rw-r--r-- 953 materials.dtd
-rw-r--r-- 31208 materials.xml
-rw-r--r-- 7881 mice.xml
-rw-r--r-- 22254 options.xml
-rw-r--r-- 25372 preferences.xml
-rw-r--r-- 436 runfgfs.bat
-rw-r--r-- 6 version