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

commands/readclock/readclock.c

@@ -4,6 +4,7 @@
 #include <lib.h>
 #include <sys/types.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <time.h>
@@ -146,6 +147,7 @@ readclock(int type, struct tm *t, int flags)
 		exit(1);
 	}
 
+	memset(&m, 0, sizeof(m));
 	m.RTCDEV_TM = (char *) t;
 	m.RTCDEV_FLAGS = flags;
 

commands/service/parse.c

@@ -727,7 +727,6 @@ struct
 {
 	{ "EXIT",		VM_EXIT },
 	{ "FORK",		VM_FORK },
-	{ "BRK",		VM_BRK },
 	{ "EXEC_NEWMEM",	VM_EXEC_NEWMEM },
 	{ "PUSH_SIG",		0 },
 	{ "WILLEXIT",		VM_WILLEXIT },

commands/service/service.c

@@ -416,6 +416,7 @@ int main(int argc, char **argv)
    * should end up here. The default is used for not yet supported requests. 
    */
   result = OK;
+  memset(&m, 0, sizeof(m));
   switch(request) {
   case RS_UPDATE:
       m.RS_LU_STATE = req_lu_state;