Clean up interface to PM and VFS

- introduce new call numbers, names, and field aliases;
- initialize request messages to zero for all ABI calls;
- format callnr.h in the same way as com.h;
- redo call tables in both servers;
- remove param.h namespace pollution in the servers;
- make brk(2) go to VM directly, rather than through PM;
- remove obsolete BRK, UTIME, and WAIT calls;
- clean up path copying routine in VFS;
- move remaining system calls from libminlib to libc;
- correct some errno-related mistakes in libc routines.

Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565

lib/libminlib/Makefile

@@ -21,9 +21,6 @@ SRCS+= gcov.c gcov_flush.c
 # Various utils
 SRCS+= itoa.c u64util.c read_tsc_64.c
 
-# svrctl
-SRCS+= svrctl.c
-
 # servxcheck
 SRCS+= servxcheck.c
 

lib/libminlib/gcov.c

@@ -4,22 +4,6 @@
 
 #include <minix/gcov.h>
 
-int gcov_flush_svr(char *buff, int buff_sz, int server_nr)
-{
-	message msg;
-
-	msg.GCOV_BUFF_P = buff;
-	msg.GCOV_BUFF_SZ = buff_sz;
-	msg.GCOV_PID = server_nr;
-
-	/* Make the call to server. It will call the gcov library,
-	 * buffer the stdio requests, and copy the buffer to this user
-	 * space
-	 */
-  	return _syscall(VFS_PROC_NR, GCOV_FLUSH, &msg);
-}
-
-
 /* wrappers for file system calls from gcc libgcov library.
    Default calls are wrapped. In libsys, an alternative
    implementation for servers is used.

lib/libminlib/svrctl.c

@@ -1,28 +0,0 @@
-/*	svrctl() - special server control functions.	Author: Kees J. Bot
- *								24 Apr 1994
- */
-#include <lib.h>
-#include <stdio.h>
-#include <sys/svrctl.h>
-
-int svrctl(int request, void *argp)
-{
-	message m;
-
-	m.m2_i1 = request;
-	m.m2_p1 = argp;
-
-	switch ((request >> 8) & 0xFF) {
-	case 'M':
-	case 'S':
-		/* PM handles calls for itself and the kernel. */
-		return _syscall(PM_PROC_NR, PM_SVRCTL, &m);
-	case 'F':
-	case 'I':
-		/* VFS handles calls for itself and inet. */
-		return _syscall(VFS_PROC_NR, VFS_SVRCTL, &m);
-	default:
-		errno = EINVAL;
-		return -1;
-	}
-}