Clean up debian/copyright file
There are several lintian warnings provided for the debian/copyright file at https://udd.debian.org/lintian/?packages=bind9 This update fixes all of them by marking new changes to bind9 in the file
Fix lintian warnings in the debian/copyright file by:
- Removing the entry for lib/isc/hp.c lib/isc/include/isc/hp.h as they were deleted in 9.18.2
- Removing the entry for lib/isc/include/pkcs11/pkcs11.h as it stopped being bundled in 9.17.19
- Updating the location of random_test.c and adding info on its public domain section
- Adding wildcards to folders as needed
- Noting m4/ uses the FSFAP license