Fix -l/-list option to parse comma-separated values

This commit fixes issue #859 where the -l/-list option did not handle
comma-separated values on a single line, unlike the -u option which
correctly parses comma-separated hosts.

Changes:
- Modified normalizeAndQueueInputs() to split file input lines by comma
- Applied same logic to stdin input for consistency
- Each item is trimmed of whitespace before processing
- Maintains backward compatibility with newline-separated inputs

Now both -u and -l options support the same comma-separated format:
  ./tlsx -u host1,host2,host3
  ./tlsx -l file.txt (where file.txt contains: host1,host2,host3)

Fixes #859

Author: buildingvibes

internal/runner/runner.go

@@ -440,7 +440,13 @@ func (r *Runner) normalizeAndQueueInputs(inputs chan taskInput) error {
 		for scanner.Scan() {
 			text := scanner.Text()
 			if text != "" {
-				r.processInputItem(text, inputs)
+				// Split by comma to support comma-separated values in a single line
+				for _, item := range strings.Split(text, ",") {
+					item = strings.TrimSpace(item)
+					if item != "" {
+						r.processInputItem(item, inputs)
+					}
+				}
 			}
 		}
 	}
@@ -449,7 +455,13 @@ func (r *Runner) normalizeAndQueueInputs(inputs chan taskInput) error {
 		for scanner.Scan() {
 			text := scanner.Text()
 			if text != "" {
-				r.processInputItem(text, inputs)
+				// Split by comma to support comma-separated values in a single line
+				for _, item := range strings.Split(text, ",") {
+					item = strings.TrimSpace(item)
+					if item != "" {
+						r.processInputItem(item, inputs)
+					}
+				}
 			}
 		}
 	}