Restrict os to linux for the time being

debian/README.debian

@@ -8,3 +8,20 @@ forwarding. This can be done by un-commenting
     net.ipv4.ip_forward=1
 
 in /etc/sysctl.conf.
+
+
+Support for non-Linux
+---------------------
+For the time being, pptpd is restricted to Linux only. Patches to
+re-enable support for other platforms are welcome.
+
+Issues on kfreebsd:
+
+* bcrelay does not compile. Workaround: Disable bcrelay
+* There's no pppd here but freebsd-ppp instead. Appearently it has a
+  completely different parameter usage.
+
+Issues on hurd:
+
+* bcrelay does not compile. Workaround: Disable bcrelay
+* No ppp at all.

debian/control

@@ -11,7 +11,7 @@ Build-Depends: debhelper (>= 9),
 Homepage: http://poptop.sourceforge.net/dox/
 
 Package: pptpd
-Architecture: any
+Architecture: linux-any
 Depends: ${misc:Depends}, ${shlibs:Depends},
     bcrelay,
     netbase,
@@ -22,7 +22,7 @@ Description: PoPToP Point to Point Tunneling Server
  connect to an internal firewalled network using their dialup.
 
 Package: bcrelay
-Architecture: any
+Architecture: linux-any
 Replaces: pptpd (<< 1.2.3-1),
 Depends: ${misc:Depends}, ${shlibs:Depends},
 Description: Broadcast relay daemon