[build] Use pdns-recursor binary packages from PowerDNS

https://repo.powerdns.com/ provides a package repository for Debian
8 which serves us automatically all security updates instead of
rebuilding the package by us.

This drops the maintenance of one additional package.

(cherry picked from commit dec0a52554c8bf8e87a0ac4dba7d7ae357672e6e)

data/live-build-config/archives/pdns.key.chroot

@@ -0,0 +1,30 @@
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+-----END PGP PUBLIC KEY BLOCK-----

scripts/build-config

@@ -59,6 +59,7 @@ options = {
    'pbuilder-debian-mirror': ('Debian repository mirror for pbuilder env bootstrap', lambda: defaults.DEBIAN_MIRROR, None),
    'salt-mirror': ('Salt package mirror', lambda: defaults.SALT_MIRROR, None),
    'vyos-mirror': ('VyOS package mirror', lambda: defaults.VYOS_MIRROR, None),
+   'pdns-mirror': ('PowerDNS package mirror', lambda: defaults.PDNS_MIRROR, None),
    'build-type': ('Build type, release or development', lambda: 'development', lambda x: x in ['release', 'development']),
    'custom-packages': ('Custom packages to install from repositories', lambda: '', None),
    'version': ('Version number (release builds only)', None, None)

scripts/defaults.py

@@ -28,6 +28,7 @@ DEBIAN_SECURITY_MIRROR = 'http://ftp.nl.debian.org/debian-security'
 DEBIAN_DISTRIBUTION = 'jessie'
 
 SALT_MIRROR = 'http://repo.saltstack.com/apt/debian/8/amd64/2017.7'
+PDNS_MIRROR = 'http://repo.powerdns.com/debian'
 
 PBUILDER_CONFIG = os.path.join(BUILD_DIR, 'pbuilderrc')
 PBUILDER_DIR = os.path.join(BUILD_DIR, 'pbuilder')

scripts/live-build-config

@@ -71,6 +71,7 @@ print("Setting up additional APT entries")
 vyos_repo_entry = "deb {0}/vyos {1} main\n".format(build_config['vyos_mirror'], build_config['vyos_branch'])
 #vyos_debian_repo_entry = "deb {0}/debian {1} main\n".format(build_config['vyos_mirror'], build_config['vyos_branch'])
 salt_repo_entry = "deb {0} {1} main\n".format(build_config['salt_mirror'], build_config['distribution'])
+pdns_repo_entry = "deb {0} {1}-rec-41 main\n".format(build_config['pdns_mirror'], build_config['distribution'])
 
 apt_file = os.path.join(build_config['build_dir'], defaults.VYOS_REPO_FILE)
 
@@ -79,11 +80,13 @@ if debug:
     print("\t", vyos_repo_entry)
 #    print("\t", vyos_debian_repo_entry)
     print("\t", salt_repo_entry)
+    print("\t", pdns_repo_entry)
 
 with open(apt_file, 'w') as f:
     f.write(vyos_repo_entry)
 #    f.write(vyos_debian_repo_entry)
     f.write(salt_repo_entry)
+    f.write(pdns_repo_entry)
 
 # Add custom APT entries
 if build_config['custom_apt_entry']: