Create generate-p12.sh Script

1. Added ability to generate .p12 file (fullPKCS12.p12) from the certificates, private keys, and certificate chain. The script downloads the root certificate from the copy of the intermediate certificate.
2. Added simlink for /etc/letsencrypt/live/npm-10/fullpkcs12.sh to  /etc/letsencrypt/live/npm-10/fullpkcs12-#.sh (Where -# is the number appended based on the number that comes after the private key in the same directory, so if privkey1.pem is in the folder then the script will generate fullpkcs12-1.sh)

Still Yet To do:
1. Add ability for changing "npm-10" by taking in an argument by the script.

Author: Whatchawnt