[pptp-server] kernel fails to build

[Brian Denheyer]

I tried again to patch and build everything.  ppp seems to build ok.
The kernel has problems :

PPP_MAGIC
PPP_VERSION

are both undeclared and so cause errors.

I also get a strange error message about
ppp_register_compressor_Rsmp_... 
and
ppp_unregister_compressor_Rsmp... 

"static declaration follows non-static".

Did I forget to check of something in make menuconfig ??

Brian