Hydra::Helper::Nix: getHydraNotifyPrometheusConfig fixup strict warning around double-declaring cfg

Dependencies

• [2] 33GPMIWV Nix::getHydraNotifyPrometheusConfig: print errors if the configuration provided is invalid.
• [3] I6QMKSIS Move getBaseUrl
• [4] 5DXGOH6Q statsd: add a chance to set hostname and port in hydra.conf
• [5] 4H6FVIWG hydra-notify: make the prometheus endpoint configurable, default-off
• [*] 2GK5DOU7 * Downloading closures.

Change contents

• replacement in src/lib/Hydra/Helper/Nix.pm at line 87
  [3.634]→[3.945:979](∅→∅),[3.979]→[2.186:212](∅→∅)
  − my $cfg = $cfg->{prometheus};

  − if (!defined($cfg)) {
  [3.634]

  [2.212]
  + my $promcfg = $cfg->{prometheus};

  + if (!defined($promcfg)) {
• replacement in src/lib/Hydra/Helper/Nix.pm at line 92
  [2.241]→[2.241:271](∅→∅)
  − if (ref $cfg ne "HASH") {
  [2.241]

  [2.271]
  + if (ref $promcfg ne "HASH") {
• replacement in src/lib/Hydra/Helper/Nix.pm at line 97
  [3.635]→[3.1056:1128](∅→∅)
  − if (defined($cfg->{"listen_address"}) && defined($cfg->{"port"})) {
  [3.635]

  [3.1128]
  + if (defined($promcfg->{"listen_address"}) && defined($promcfg->{"port"})) {
• replacement in src/lib/Hydra/Helper/Nix.pm at line 99
  [3.1145]→[3.1145:1241](∅→∅)
  − "listen_address" => $cfg->{'listen_address'},

  − "port" => $cfg->{'port'},
  [3.1145]

  [3.1241]
  + "listen_address" => $promcfg->{'listen_address'},

  + "port" => $promcfg->{'port'},