Comma separated -w flags (#294)

* Comma separated -w flags.

* Remove printf

* Updated changelog and contributors

* Alphabetical order

CHANGELOG.md

@@ -5,6 +5,7 @@
 
   - Changed
     - Pre-flight errors are now displayed also after the usage text to prevent the need to scroll through backlog.
+    - The `-w` flag now accepts comma delimited values in the form of `file1:W1,file2:W2`.
 
 - v1.1.0
   - New

CONTRIBUTORS.md

@@ -1,4 +1,5 @@
 # Contributors
+* [AverageSecurityGuy](https://github.com/averagesecurityguy)
 * [bjhulst](https://github.com/bjhulst)
 * [bsysop](https://twitter.com/bsysop)
 * [ccsplit](https://github.com/ccsplit)

main.go

@@ -58,7 +58,14 @@ func (m *multiStringFlag) String() string {
 }
 
 func (m *multiStringFlag) Set(value string) error {
-	*m = append(*m, value)
+	delimited := strings.Split(value, ",")
+
+	if len(delimited) > 1 {
+		*m = append(*m, delimited...)
+	} else {
+		*m = append(*m, value)
+	}
+
 	return nil
 }