openbsd: update relayd and httpd configuration files

* httpd: use proper server names
* httpd: add example of a very basic static website along with Pleroma
* httpd: let Pleroma serve robots.txt
* relayd: add example of forwarding to a basic httpd website
* relayd: remove appended response headers (most of them already served
  by Pleroma anyway)
* relayd: add comments about hosting Pleroma on subdomains
* relayd: reject request that don't belong to any forward
* relayd: add example of hosting media uploads on subdomain
* relayd: change forward timeout check to something sane that actually
  works

installation/openbsd/httpd.conf

@@ -4,8 +4,9 @@
 # 1. Place file in /etc
 # 2. Replace <IPv4 address> with your public IP address
 # 3. If using IPv6, uncomment IPv6 lines and replace <IPv6 address> with your public IPv6 address
-# 4. Check file using 'doas httpd -n'
-# 5. Enable and start httpd:
+# 4. Replace all occurences of example.tld with your instance's domain name.
+# 5. Check file using 'doas httpd -n'
+# 6. Enable and start httpd:
 #      # doas rcctl enable httpd
 #      # doas rcctl start httpd
 #
@@ -13,7 +14,7 @@
 ext_inet="<IPv4 address>"
 #ext_inet6="<IPv6 address>"
 
-server "default" {
+server "example.tld" {
     listen on $ext_inet port 80 # Comment to disable listening on IPv4
 #    listen on $ext_inet6 port 80 # Comment to disable listening on IPv6
     listen on 127.0.0.1 port 80 # Do NOT comment this line
@@ -26,10 +27,18 @@ server "default" {
         request strip 2
     }
 
-    location "/robots.txt" { root "/htdocs/local/" }
     location "/*" { block return 302 "https://$HTTP_HOST$REQUEST_URI" }
 }
 
+# Example of serving a basic static website besides Pleroma using the example configuration in relayd
+#server "site.example.tld" {
+#    listen on 127.0.0.1 port 8080
+#
+#    location "/*" {
+#        root "/website"
+#    }
+#}
+
 types {
     include "/usr/share/misc/mime.types"
 }