Add some basic debug output for log compression

Guarded by --debug=compress, like the other debug measures.

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/init.c b/init.c
index 57aa702..cf1d7f9 100644
--- a/init.c
+++ b/init.c
@@ -1569,7 +1569,7 @@
 	printf("%s [options] [job options] <job file(s)>\n", name);
 	printf("  --debug=options\tEnable debug logging. May be one/more of:\n"
 		"\t\t\tprocess,file,io,mem,blktrace,verify,random,parse,\n"
-		"\t\t\tdiskutil,job,mutex,profile,time,net,rate\n");
+		"\t\t\tdiskutil,job,mutex,profile,time,net,rate,compress\n");
 	printf("  --parse-only\t\tParse options only, don't start any IO\n");
 	printf("  --output\t\tWrite output to file\n");
 	printf("  --runtime\t\tRuntime in seconds\n");
@@ -1677,6 +1677,10 @@
 	  .help = "Rate logging",
 	  .shift = FD_RATE,
 	},
+	{ .name = "compress",
+	  .help = "Log compression logging",
+	  .shift = FD_COMPRESS,
+	},
 	{ .name = NULL, },
 };