freshclam, sigtool: use zlib's Z_FILTERED strategy

Thanks to Edwin

ChangeLog

@@ -1,3 +1,8 @@
+Mon Feb  8 10:30:03 CET 2010 (tk)
+---------------------------------
+ * freshclam, sigtool: use zlib's Z_FILTERED strategy
+		       Thanks to Edwin
+
 Sat Feb  6 16:02:28 CET 2010 (acab)
 -----------------------------------
  * clamd/server-th.c: reset the selfcheck timeout even if we reload

freshclam/manager.c

@@ -1370,7 +1370,7 @@ static int buildcld(const char *tmpdir, const char *dbname, const char *newfile,
 
     if(compr) {
 	close(fd);
-	if(!(gzs = gzopen(newfile, "ab"))) {
+	if(!(gzs = gzopen(newfile, "ab9f"))) {
 	    logg("!buildcld: gzopen() failed for %s\n", newfile);
 	    CHDIR_ERR(cwd);
 	    unlink(newfile);

sigtool/sigtool.c

@@ -569,7 +569,7 @@ static int script2cdiff(const char *script, const char *builder, const struct op
 	return -1;
     }
 
-    if(!(gzh = gzopen(cdiff, "ab"))) {
+    if(!(gzh = gzopen(cdiff, "ab9f"))) {
 	mprintf("!script2cdiff: Can't open file %s for appending\n", cdiff);
 	unlink(cdiff);
 	free(cdiff);
@@ -836,7 +836,7 @@ static int build(const struct optstruct *opts)
 	return -1;
     }
 
-    if((tar = gzopen(tarfile, "wb")) == NULL) {
+    if((tar = gzopen(tarfile, "wb9f")) == NULL) {
 	mprintf("!build: Can't open file %s for writing\n", tarfile);
 	free(tarfile);
 	FREE_LS(dblist2);