Revert "Remove references to removed options (apache#7756)"

This reverts commit 09ea857.

configs/records.config.default.in

@@ -35,6 +35,7 @@ CONFIG proxy.config.http.insert_response_via_str INT 0
 #    https://docs.trafficserver.apache.org/en/latest/admin-guide/files/parent.config.en.html
 ##############################################################################
 CONFIG proxy.config.http.parent_proxy.retry_time INT 300
+CONFIG proxy.config.http.parent_proxy.connect_attempts_timeout INT 30
 CONFIG proxy.config.http.forward.proxy_auth_to_parent INT 0
 CONFIG proxy.config.http.uncacheable_requests_bypass_parent INT 1
 
@@ -59,6 +60,7 @@ CONFIG proxy.config.http.connect_attempts_max_retries INT 3
 CONFIG proxy.config.http.connect_attempts_max_retries_dead_server INT 1
 CONFIG proxy.config.http.connect_attempts_rr_retries INT 3
 CONFIG proxy.config.http.connect_attempts_timeout INT 30
+CONFIG proxy.config.http.post_connect_attempts_timeout INT 1800
 CONFIG proxy.config.http.down_server.cache_time INT 60
 
 ##############################################################################

lib/perl/lib/Apache/TS/AdminClient.pm

@@ -474,11 +474,13 @@ The Apache Traffic Server Administration Manual will explain what these strings
  proxy.config.http.per_server.connection.max
  proxy.config.http.origin_min_keep_alive_connections
  proxy.config.http.parent_proxies
+ proxy.config.http.parent_proxy.connect_attempts_timeout
  proxy.config.http.parent_proxy.fail_threshold
  proxy.config.http.parent_proxy.file
  proxy.config.http.parent_proxy.per_parent_connect_attempts
  proxy.config.http.parent_proxy.retry_time
  proxy.config.http.parent_proxy.total_connect_attempts
+ proxy.config.http.post_connect_attempts_timeout
  proxy.config.http.post_copy_size
  proxy.config.http.push_method_enabled
  proxy.config.http.quick_filter.mask