When "refuse options = compress" is set in rsyncd.conf, silently send files

at compression level 0 instead of printing an error and exitting.  This is
the same effect as "dont compress = *".

options.c

@@ -238,6 +238,13 @@ static int check_refuse_options(char *ref, int opt)
 	while ((p = strstr(ref,name))) {
 		if ((p==ref || p[-1]==' ') &&
 		    (p[len] == ' ' || p[len] == 0)) {
+			if (opt == 'z') {
+				/* don't actually refuse this one, just */
+				/*  minimize the compression level for now */
+				extern int default_compression_level;
+				default_compression_level = 0;
+				return 0;
+			}
 			slprintf(err_buf,sizeof(err_buf),
 				 "The '%s' option is not supported by this server\n", name);
 			return 1;

rsyncd.conf.yo

@@ -303,7 +303,8 @@ a 10 minute timeout).
 dit(bf(refuse options)) The "refuse options" option allows you to
 specify a space separated list of rsync command line options that will
 be refused by your rsync server. When an option is refused the server
-prints an error message and exits.
+prints an error message and exits, except for the "compress" option
+in which case the server silently sends all files uncompressed.
 
 The full names of the options must be used (ie. you must use
 "checksum" not "c" to disable checksumming).

token.c

@@ -21,6 +21,7 @@
 #include "zlib/zlib.h"
 
 extern int do_compression;
+int default_compression_level = Z_DEFAULT_COMPRESSION;
 static int compression_level = Z_DEFAULT_COMPRESSION;
 
 /* determine the compression level based on a wildcard filename list */
@@ -32,7 +33,7 @@ void set_compression(char *fname)
 
 	if (!do_compression) return;
 
-	compression_level = Z_DEFAULT_COMPRESSION;
+	compression_level = default_compression_level;
 	dont = lp_dont_compress(module_id);
 
 	if (!dont || !*dont) return;