add key files to ignore list

Author: arif-pragmasys

.gitignore

@@ -239,9 +239,18 @@ ssh_host_rsa_key
 ssh_host_rsa_key
 ssh_host_rsa_key
 ssh_host_dsa_key
+ssh_host_dsa_key.pub
 ssh_host_ecdsa_key.pub
+ssh_host_ecdsa_key
+ssh_host_ed25519_key
+ssh_host_ed25519_key.pub
 ssh_host_rsa_key.pub
 id_rsa.pub
+id_rsa
+id_dsa.pub
+id_dsa
+is_rsa
+is_rsa.pub
 regress/t10.out.pub
 regress/t12.out.pub
 regress/t6.out1