ISO must be an Ubuntu (or Ubuntu flavour)

[kenorb]

$ ./isorespin.sh -i ubuntu-16.04.4-server-i386.iso --atom
...
++ grep '^Volume id:'
+ ISO_VOLID='Volume id: Ubuntu-Server 16.04.4 LTS i386'
+ ISO_VOLID='Ubuntu-Server 16.04.4 LTS i386'
+ ISO_DISTRO=Ubuntu-Server
+ '[' Ubuntu-Server == Linux ']'
+ SUPPORTED Ubuntu-Server Ubuntu Kubuntu Lubuntu Lubuntu-Next Ubuntu-Budgie Ubuntu-GNOME Ubuntu-MATE Xubuntu Mint neon elementary BackBox Peppermint
+ for OS in '"${@:2}"'
+ [[ Ubuntu == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Kubuntu == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Lubuntu == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Lubuntu-Next == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Ubuntu-Budgie == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Ubuntu-GNOME == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Ubuntu-MATE == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Xubuntu == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Mint == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ neon == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ elementary == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ BackBox == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ for OS in '"${@:2}"'
+ [[ Peppermint == \U\b\u\n\t\u\-\S\e\r\v\e\r ]]
+ DISPLAY_MESSAGE './isorespin.sh: '\''/home/ubuntu/workspace/ubuntu-16.04.4-server-i386.iso'\'' must be an Ubuntu (or Ubuntu flavour), Linux Mint, neon, elementary, BackBox or Peppermint desktop ISO.'
+ DISPLAY_TEXT='./isorespin.sh: '\''/home/ubuntu/workspace/ubuntu-16.04.4-server-i386.iso'\'' must be an Ubuntu (or Ubuntu flavour), Linux Mint, neon, elementary, BackBox or Peppermint desktop ISO.'