Revert "Remove more comments, #5756"

This reverts commit b4a217d.

Author: helmo

install/tpl/postfix_2-10.conf.master

@@ -1,3 +1,5 @@
+# Postfix configuration for version 2.10 and up
 smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
 
+# This is supported in version 2.9, but lets not create another conf file for it
 address_verify_sender_ttl = 15686s

install/tpl/postfix_2-5.conf.master

@@ -0,0 +1,13 @@
+# Postfix configuration for version 2.5 and up
+
+# These will make postfix adapt more to load spikes
+#{stress_adaptive} in_flow_delay = ${stress?3}${stress:1}s
+#{stress_adaptive} smtp_connect_timeout = ${stress?10}${stress:30}s
+#{stress_adaptive} smtp_helo_timeout = ${stress?10}${stress:60}s
+#{stress_adaptive} smtp_mail_timeout = ${stress?10}${stress:60}s
+#{stress_adaptive} smtpd_error_sleep_time = ${stress?1}${stress:2}s
+#{stress_adaptive} smtpd_hard_error_limit = ${stress?1}${stress:10}
+#{stress_adaptive} smtpd_recipient_overshoot_limit = ${stress?60}${stress:600}
+#{stress_adaptive} smtpd_soft_error_limit = ${stress?2}${stress:5}
+#{stress_adaptive} smtpd_timeout = ${stress?10}${stress:60}s
+

install/tpl/postfix_3-0.conf.master

@@ -0,0 +1,13 @@
+# Postfix configuration for version 3.0 and up
+
+# These will make postfix adapt more to load spikes
+#{stress_adaptive} in_flow_delay = ${stress?{3}:{1}}s
+#{stress_adaptive} smtp_connect_timeout = ${stress?{10}:{30}}s
+#{stress_adaptive} smtp_helo_timeout = ${stress?{10}:{60}}s
+#{stress_adaptive} smtp_mail_timeout = ${stress?{10}:{60}}s
+#{stress_adaptive} smtpd_error_sleep_time = ${stress?{1}:{2}}s
+#{stress_adaptive} smtpd_hard_error_limit = ${stress?{1}:{10}}
+#{stress_adaptive} smtpd_recipient_overshoot_limit = ${stress?{60}:{600}}
+#{stress_adaptive} smtpd_soft_error_limit = ${stress?{2}:{5}}
+#{stress_adaptive} smtpd_timeout = ${stress?{10}:{60}}s
+

install/tpl/postfix_3-3.conf.master

@@ -1 +1,4 @@
+# Postfix configuration for version 3.3 and up
+
+# 3.2 and earlier should not have this set when using reject_unverified_recipient
 enable_original_recipient = no