The following changes were made:

* Added patch routine
  * Added patch to disable nis in default config
  * Updated init script to use status_of_proc
  * usher will now restart postfix if running

SRC/patches/01_remove-nis.patch

@@ -0,0 +1,12 @@
+diff -Naur a/conf/main.cf b/conf/main.cf
+--- a/conf/main.cf	2017-02-18 19:58:20.000000000 -0600
++++ b/conf/main.cf	2018-06-06 18:43:23.134275240 -0500
+@@ -398,7 +398,7 @@
+ # "postfix reload" to eliminate the delay.
+ #
+ #alias_maps = dbm:/etc/aliases
+-#alias_maps = hash:/etc/aliases
++alias_maps = hash:/etc/aliases
+ #alias_maps = hash:/etc/aliases, nis:mail.aliases
+ #alias_maps = netinfo:/aliases
+