pkgman updates to simplify distribution with different kernels

cfg/rc.cfg

@@ -1 +0,0 @@
-{enabled={"getty","minitel","fsmanager"}}

lib/pkgman.lua

@@ -10,6 +10,8 @@ if not w then lz16 = nil end
 fs.makeDirectory("/boot/pkg")
 fs.makeDirectory("/boot/cfg/pkg")
 require "pkgfs"
+local kver,kvar = _OSVERSION:match("(%x+)%-([^-]-)$")
+kver,kvar = kver or "unknown", kvar or "base"
 
 local function getSources()
  local f = io.open(pkg.sourcePath,"rb")
@@ -27,7 +29,7 @@ end
 
 local function getInstalled()
  local f = io.open(pkg.installedPath,"rb")
- if not f then return {} end
+ if not f then return {psychos={version=kver},["kernel-"..kvar]={version=kver}} end
  local c = f:read("*a")
  f:close()
  return serial.unserialize(c)