- enable remembering of device memory ranges set by PCI and

told to kernel
  - makes VM ask the kernel if a certain process is allowed
    to map in a range of physical memory (VM rounds it to page
    boundaries afterwards - but it's impossible to map anything
    smaller otherwise so I assume this is safe, i.e. there won't
    be anything else in that page; certainly no regular memory)
  - VM permission check cleanup (no more hardcoded calls, less
    hardcoded logic, more readable main loop), a loose end left
    by GQ
  - remove do_copy warning, as the ipc server triggers this but
    it's no more harmful than the special cases already excluded
    explicitly (VFS, PM, etc).

include/minix/syslib.h

@@ -47,6 +47,8 @@ _PROTOTYPE( int sys_trace, (int req, endpoint_t proc_ep, long addr, long *data_p
 _PROTOTYPE( int sys_runctl, (endpoint_t proc_ep, int action, int flags));
 
 _PROTOTYPE( int sys_privctl, (endpoint_t proc_ep, int req, void *p));
+_PROTOTYPE( int sys_privquery_mem, (endpoint_t proc_ep,
+	phys_bytes physstart, phys_bytes physlen));
 _PROTOTYPE( int sys_setgrant, (cp_grant_t *grants, int ngrants));
 _PROTOTYPE( int sys_nice, (endpoint_t proc_ep, int priority));