Update ss-install-misc.txt

Install rsync if not exists (seems to be an issue on RackNerd and perhaps other cloud networks).

Ref: #77

ss-install-misc.txt

@@ -39,6 +39,9 @@ apt install update-manager-core
 ## install Linux utilities (Zip, Unzip, DOS2Unix) ##
 apt install zip unzip dos2unix
 
+## install rsync (some cloud networks apparently remove it from Ubuntu ISO for some reason as per GitHub issues) ##
+apt install rsync
+
 ## install Git ##
 apt install git
 
@@ -49,6 +52,7 @@ apt install debconf-utils
 #### SlickStack: External References Used To Improve This Script (Thanks, Interwebz) ###############
 ####################################################################################################
 
-## Ref: 
+## Ref: https://github.com/littlebizzy/slickstack/issues/77
+## Ref: https://help.ubuntu.com/community/rsync
 
 ## SS_EOF