Delete multiple IPs easily from phpIPAM

It's quite a slow process to delete IP address from phpIPAM. So here's a script to make this a quick process.

phpIPAM credentials

Currently the credentials are not stored within this file (for obvious reasons). You may make a secrets.sh file with your phpIPAM credentials inside.

secrets.sh:

ipam_creds=username:password

How to use this script

Set your Subnet ID in the remove.sh file
Update the hostname and your 'my_app' name as per the API documentation here
Add all the IP addresses from the respective Subnet ID into the ips.txt file
- If you need to add a range of IPs to the ips.txt file, you can use the ip-range-creator.sh script to create your range quickly.
  
  Example usage:
```
./ip-range-creator.sh 192.168.1.1 192.168.1.50 > ips.txt
```
  Then run the remove.sh script as normal.