Allow hyphens and underscores in basepath

server/server.go

@@ -540,6 +540,6 @@ func clientUsage(values client.Values) *client.Usage {
 }
 
 func validBasepath(basepath string) bool {
-	re := regexp.MustCompile(`(\/{1}\w+)+`)
+	re := regexp.MustCompile(`(\/{1}[\w-]+)+`)
 	return re.ReplaceAllLiteralString(basepath, "") == ""
 }

server/server_test.go

@@ -43,6 +43,13 @@ func Test_validBasepath(t *testing.T) {
 			},
 			want: true,
 		},
+		{
+			name: "Basepath can include numbers, hyphens, and underscores",
+			args: args{
+				basepath: "/3shishka-bob/-rus4s_rus-1_s-",
+			},
+			want: true,
+		},
 		{
 			name: "Basepath is not empty and invalid - no slashes",
 			args: args{