[Fix] Composites: Allow partial match

src/libserver/composites.c

@@ -449,8 +449,8 @@ rspamd_composite_process_single_symbol (struct composites_data *cd,
 					}
 				}
 				else {
-					if (rspamd_regexp_match (cur_opt->data.re,
-							opt->option, opt->optlen, FALSE)) {
+					if (rspamd_regexp_search (cur_opt->data.re,
+							opt->option, opt->optlen, NULL, NULL, FALSE, NULL)) {
 						found = true;
 
 						break;

test/functional/cases/109_composites.robot

@@ -70,3 +70,9 @@ Composites - Opts RE Hit 2
   Expect Symbol With Score  SYMOPTS3  6.00
   Do Not Expect Symbol  SYMOPTS2
   Do Not Expect Symbol  SYMOPTS1
+
+Composites - Opts RE Hit 3
+  Scan File  ${MESSAGE}  opts=example.com->app.link
+  Expect Symbol With Score  SYMOPTS4  6.00
+  Do Not Expect Symbol  SYMOPTS2
+  Do Not Expect Symbol  SYMOPTS1

test/functional/configs/composites.conf

@@ -80,4 +80,8 @@ composites {
       expression = 'OPTS[sym2,/FoO\\//i]';
       score = 6.0;
     }
+    SYMOPTS4 {
+      expression = 'POSITIVE_A & OPTS[/>app.link$/i] & EXPRESSIONS';
+      score = 6.0;
+    }
 }