assume remote from rdbfs; get text from /proc/%d text.
from steve stallion's acid-fixup patch on sources.

Reference: /n/atom/patch/applied2013/acidremote
Date: Fri Jul 26 15:41:07 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/acid/main.c	Fri Jul 26 15:40:01 2013
+++ /sys/src/cmd/acid/main.c	Fri Jul 26 15:40:02 2013
@@ -88,8 +88,10 @@
 			aout = argv[0];
 		}
 	} else
-	if(remote)
-		aout = "/mips/9ch";
+	if(remote) {
+		snprint(prog, sizeof(prog), "/proc/%d/text", pid);
+		aout = prog;
+	}
 
 	fmtinstall('x', xfmt);
 	fmtinstall('L', Lfmt);