pfSense

Consolidate shaper input validation

Remove the duplicate function and integrate it with the rest of the
validate_input() methods.
do_input_validation() in guiconfig.inc cannot be included in shaper.inc;
this change avoids moving it somewhere that may not be ideal.

Don't refresh the cache when visiting the update page. Fix #15055

Show the target for auto outbound NAT rules. Fix #15025

Append a new line to NAT rule errors. Fix #15024

Update fontawesome references in form buttons

More fontawesomev6 updates

Merge pull request #4615 from blkeller/apu2-expanded-serial-fix

Fix IPsec log value handling. Fixes #14990

Refactor use of return_gateways_array() with get_gateways(). Fix #14893

Most calls to return_gateways_array() do not need the gateway list to be
recreated. get_gateways() can filter the gateway list, and indexing is
moved from return_gateways_array() to get_gateways() to avoid using...

Don't split fontawesome icon names

This makes it easier to update fontawesome versions. While here, fix a
missing closing quote, and use the correct fontawesome prefix.