daemon: Don't need to prefix error messages with the command name.

The RPC stubs already prefix the command name to error messages.
The daemon doesn't have to do this.  As a (small) benefit this also
makes the daemon slightly smaller.

Code in the daemon such as:

  if (argv[0] == NULL) {
    reply_with_error ("passed an empty list");
    return NULL;
  }

now results in error messages like this:

  ><fs> command ""
  libguestfs: error: command: passed an empty list

(whereas previously you would have seen ..command: command:..)

1 files changed, 1 insertions, 1 deletions

diff --git a/daemon/link.c b/daemon/link.c
index 5ea0d39d..3766d8ca 100644
--- a/daemon/link.c
+++ b/daemon/link.c
@@ -68,7 +68,7 @@ do_readlinklist (const char *path, char *const *names)
   CHROOT_OUT;
 
   if (fd_cwd == -1) {
-    reply_with_perror ("readlinklist: %s", path);
+    reply_with_perror ("open: %s", path);
     return NULL;
   }