Description of problem:
The default configuration in /etc/lighttpd/lighttpd.conf points to /run/lighttpd/ for runtime state:

   var.state_dir   = "/run/lighttpd"

But this directory does not exist, and cannot be created since LigHTTPd runs as its own user:

   server.username  = "lighttpd"

This means that LigHTTPd fails to start, claiming "opening pid-file failed: /run/lighttpd/lighttpd.pid No such file or directory":

● lighttpd.service - Lightning Fast Webserver With Light System Requirements
   Loaded: loaded (/usr/lib/systemd/system/lighttpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2020-06-22 19:50:43 CEST; 5min ago
  Process: 3047 ExecStart=/usr/sbin/lighttpd -D -f /etc/lighttpd/lighttpd.conf (code=exited, status=255)
 Main PID: 3047 (code=exited, status=255)

Jun 22 19:50:43 webserver systemd[1]: Started Lightning Fast Webserver With Light System Requirements.
Jun 22 19:50:43 webserver lighttpd[3047]: 2020-06-22 19:50:43: (server.c.1233) opening pid-file failed: /run/lighttpd/lighttpd.pid No such file or directory
Jun 22 19:50:43 webserver lighttpd[3047]: 2020-06-22 19:50:43: (server.c.424) unlink failed for: /run/lighttpd/lighttpd.pid 2 No such file or directory
Jun 22 19:50:43 webserver systemd[1]: lighttpd.service: Main process exited, code=exited, status=255/n/a
Jun 22 19:50:43 webserver systemd[1]: lighttpd.service: Failed with result 'exit-code'.

Interestingly, the spec file contains code for handling this, at https://src.fedoraproject.org/rpms/lighttpd/blob/30ec12b96be54a47693139c510e2e3b0d5537d86/f/lighttpd.spec#_230

   mkdir -p %{buildroot}/usr/lib/tmpfiles.d
   echo 'D /run/lighttpd 0750 lighttpd lighttpd -' > \
       %{buildroot}/usr/lib/tmpfiles.d/lighttpd.conf

But that file does not exist on the system or in the RPM:

   # rpm -qil lighttpd | grep tmpfiles
   # 

Manually creating this file makes LigHTTPd work.

The code in the spec file creating the tmpfiles.d configuration is behind an "%if %{with tmpfiles}" block, so it seems that the RPM build should be configured to set this variable on EPEL 8.

Version-Release number of selected component (if applicable):
lighttpd-1.4.55-2.el8.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Install CentOS 8
2. dnf install epel-release
3. dnf install lighttpd
4. systemctl start lighttpd

Actual results:
LigHTTPD does not start. "systemctl status lighttpd" contains the error message "opening pid-file failed: /run/lighttpd/lighttpd.pid No such file or directory".

Expected results:
LigHTTPD starts.