user/group names get too long

[qknight]

issue description

user/group names are getting too long:

the limit is 32 characters according to the useradd manpage

systemctl status static-darkhttpd-options-search-darkhttpd

echo static-darkhttpd-options-search-darkhttpd | wc
      1       1      42

the problem is that systemd won't be able to start the services with a 'too' long username and bail out with a:

Mar 08 18:58:01 nixos systemd[1]: /nix/store/0fd31nk9n2yankhvg5hq2z7nxa7gcr29-unit-static-darkhttpd-iiiiiiii-darkhttpd.service/static-darkhttpd-iiiiiiii-darkhttpd.service:14: Invalid user/group name or numeric ID: static-darkhttpd-iiiiiiii-webserver
Mar 08 18:58:01 nixos systemd[1]: static-darkhttpd-iiiiiiii-darkhttpd.service: Cannot add dependency job, ignoring: Unit static-darkhttpd-iiiiiiii-darkhttpd.service is not loaded properly: Exec format error.

nixpkgs

NixOS/nixpkgs#36556

nixcloud-webservices

@aszlig i'd like to apply this patch

diff --git a/modules/web/core/webserver.nix b/modules/web/core/webserver.nix
index 6d0ebb4..c7d5e12 100644
--- a/modules/web/core/webserver.nix
+++ b/modules/web/core/webserver.nix
@@ -59,7 +59,7 @@ in {
     };
 
     webserver.user = lib.mkOption {
-      default = "webserver";
+      default = "";
       type = lib.types.str;
       description = "The main user name which executes this webservice.";
     };
@@ -76,7 +76,7 @@ in {
     };
 
     webserver.group = lib.mkOption {
-      default = "webserver";
+      default = "";
       type = lib.types.str;
       description = "The main group name which executes this webservice.";
     };