Issue wildfly-security#123 Add an initial-contributors.md to identify…

… the names of individuals who had previously contributed to the ApplicationSecurityDomain class within the Undertow subsystem prior to this code being ported here.

undertow-servlet/initial-contributors.md

@@ -0,0 +1,17 @@
+Initial Contributors
+====================
+
+The initial code populating this module was originally written within the class 'org.wildfly.extension.undertow.ApplicationSecurityDomainDefinition' within the Undertow subystem which is a part of the WildFly application server project [https://github.com/wildfly/wildfly](https://github.com/wildfly/wildfly).
+
+At the time of migration the following individuals had made contributions to this class: -
+*  Brian Stansberry
+*  Chao Wang
+*  Darran Lofthouse
+*  David M. Lloyd
+*  Farah Juma
+*  Jan Kalina
+*  Kabir Khan
+*  Paul Ferraro
+*  Pedro Igor
+*  Stuart Douglas
+*  Tomaz Cerar