Function tln_fixatts

This function runs various checks against the attributes.

Parameters summary

`string`	`$tagname`	String with the name of the tag.
`array`	`$attary`	Array with all tag attributes.
`array`	`$rm_attnames`	See description for tln_sanitize
`array`	`$bad_attvals`	See description for tln_sanitize
`array`	`$add_attr_to_tag`	See description for tln_sanitize
`string`	`$trans_image_path`
`boolean`	`$block_external_images`

`Array`	with modified attributes.