[#3019] remove limitation on db retry from doc

Author: andrei-pavel

doc/sphinx/arm/database-connectivity.rst

@@ -24,10 +24,6 @@ system allows nanny scripts to detect the problem.
 If ``retry-on-startup`` is set to ``true``, the server will start reconnection
 attempts even at server startup or on reconfigure events, and will honor the
 action specified in the ``on-fail`` parameter.
-Database connection retries are not attempted on startup if the
-:ischooklib:`libdhcp_limits.so` is loaded, because the hook library requires a
-valid connection to the database to check whether JSON format is supported and to
-recount class limits.
 
 During dynamic reconfiguration, all backends are disconnected and then
 reconnected using the new configuration. If connectivity to any of the
@@ -69,7 +65,7 @@ as read-only, Kea attempts to initialize the schema.
 .. note::
 
     Kea does not automatically attempt to upgrade an existing schema; doing so
-    might deprive users of the opportunity to take precautions, such as 
+    might deprive users of the opportunity to take precautions, such as
     backing up the database or temporarily shutting off running
     Kea servers that are currently operating on the database.
 

doc/sphinx/arm/dhcp4-srv.rst

@@ -825,10 +825,6 @@ system allows nanny scripts to detect the problem.
 If ``retry-on-startup`` is set to ``true``, the server starts reconnection
 attempts even at server startup or on reconfigure events, and honors the
 action specified in the ``on-fail`` parameter.
-Database connection retries are not attempted on startup if the
-:ischooklib:`libdhcp_limits.so` is loaded, because the hook library requires a
-valid connection to the database to verify whether JSON format is supported and to
-recount class limits.
 
 Finally, the credentials of the account under which the server will
 access the database should be set:

doc/sphinx/arm/dhcp6-srv.rst

@@ -781,10 +781,6 @@ system allows nanny scripts to detect the problem.
 If ``retry-on-startup`` is set to ``true``, the server starts reconnection
 attempts even at server startup or on reconfigure events, and honors the
 action specified in the ``on-fail`` parameter.
-Database connection retries are not attempted on startup if the
-:ischooklib:`libdhcp_limits.so` is loaded, because the hook library requires a
-valid connection to the database to verify whether JSON format is supported and to
-recount class limits.
 
 Finally, the credentials of the account under which the server will
 access the database should be set:

doc/sphinx/arm/hooks-limits.rst

@@ -117,13 +117,6 @@ This is how a lease limit is defined for a subnet inside a shared network:
     respective client class or subnet. To reset the lease count, change the client class name
     or the subnet ID.
 
-.. note::
-
-    If :ischooklib:`libdhcp_limits.so` is loaded, database connection retries are not attempted
-    on startup. The hook library requires a
-    valid connection to the database to check whether JSON format is supported and to
-    recount class limits.
-
 .. _hooks-limits-lease-limiting:
 
 Lease Limiting