Examples:
 1. Create a short link to https://duckduckgo.com
   $ curl -d https://duckduckgo.com short.swurl.xyz
   short.swurl.xyz/502fb5543c36014f

 2. Create a short link with a custom path
  $ curl -d https://duckduckgo.com short.swurl.xyz/ddg
   short.swurl.xyz/ddg

 3. Create a short link to https://duckduckgo.com using a query string
   $ curl short.swurl.xyz?https://duckduckgo.com
   short.swurl.xyz/1acd382417199d7e

 4. Create a short link with a custom path using a query string
   $ curl short.swurl.xyz/ddg?https://duckduckgo.com
   short.swurl.xyz/ddg

 5. Deleting a short link
   $ TMP=$(mktemp)
   $ LINK=$(curl -sS short.swurl.xyz -d https://duckduckgo.com -D $TMP)
   $ # Link created, headers stored in temp file
   $ DEL=$(cat $TMP | grep -i delete-with | awk '{print$2}'| tr -d '\r')
   $ # Gets the deletion key, in the 'X-Delete-With' header
   $ curl $LINK
   <a href="https://duckduckgo.com">Permanent Redirect</a>.
   $ curl $LINK -X DELETE -d $DEL
   $ curl $LINK
   this short link does not exist
   $ # Link has been deleted