nixos/jenkins: rename option 'host' to 'listenAddress'

I think the name 'listenAddress' is more descriptive. Other NixOS
modules that define 'host' either use it as listen address or as address
a client connects to. listenAddress is unambiguous.

The addition of 'host' was added earlier today[1], so not bothering with
./nixos/modules/rename.nix.

[1]: 44ea184997 ("jenkins ci enhancement: add port and prefix option")

nixos/modules/services/continuous-integration/jenkins/default.nix

@@ -48,7 +48,7 @@ in {
         '';
       };
 
-      host = mkOption {
+      listenAddress = mkOption {
         default = "0.0.0.0";
         example = "localhost";
         type = types.str;
@@ -156,18 +156,18 @@ in {
       '';
 
       script = ''
-        ${pkgs.jdk}/bin/java -jar ${pkgs.jenkins} --httpListenAddress=${cfg.host} \
+        ${pkgs.jdk}/bin/java -jar ${pkgs.jenkins} --httpListenAddress=${cfg.listenAddress} \
                                                   --httpPort=${toString cfg.port} \
                                                   --prefix=${cfg.prefix} \
                                                   ${concatStringsSep " " cfg.extraOptions}
       '';
 
       postStart = ''
-        until ${pkgs.curl}/bin/curl -s -L ${cfg.host}:${toString cfg.port}${cfg.prefix} ; do
+        until ${pkgs.curl}/bin/curl -s -L ${cfg.listenAddress}:${toString cfg.port}${cfg.prefix} ; do
           sleep 10
         done
         while true ; do
-          index=`${pkgs.curl}/bin/curl -s -L ${cfg.host}:${toString cfg.port}${cfg.prefix}`
+          index=`${pkgs.curl}/bin/curl -s -L ${cfg.listenAddress}:${toString cfg.port}${cfg.prefix}`
           if [[ !("$index" =~ 'Please wait while Jenkins is restarting' ||
                   "$index" =~ 'Please wait while Jenkins is getting ready to work') ]]; then
             exit 0

nixos/modules/services/continuous-integration/jenkins/job-builder.nix

@@ -144,7 +144,7 @@ in {
             done
 
             echo "Asking Jenkins to reload config"
-            curl --silent -X POST http://${jenkinsCfg.host}:${toString jenkinsCfg.port}${jenkinsCfg.prefix}/reload
+            curl --silent -X POST http://${jenkinsCfg.listenAddress}:${toString jenkinsCfg.port}${jenkinsCfg.prefix}/reload
           '';
       serviceConfig = {
         User = jenkinsCfg.user;