* lang/funcs: new `abspath` function returns the absolute path to a given file [GH-21409]
* backend/swift: support for user configured state object names in swift containers [GH-17465]
* lang/funcs: new `abspath` function returns the absolute path to a given file ([#21409](https://github.com/hashicorp/terraform/issues/21409))
* backend/swift: support for user configured state object names in swift containers ([#17465](https://github.com/hashicorp/terraform/issues/17465))
BUG FIXES:
* core: Prevent crash when a resource has no current valid instance [GH-21979]
* plugin/sdk: Prevent empty strings from being replaced with default values [GH-21806]
* plugin/sdk: Ensure resource timeouts are not lost when there is an empty plan [GH-21814]
* plugin/sdk: Don't add null elements to diagnostic paths when validating config [GH-21884]
* lang/funcs: Add missing map of bool support for `lookup`[GH-21863]
* config: Fix issue with downloading BitBucket modules from deprecated V1 API by updating go-getter dependency [GH-21948]
* config: Fix conditionals to evaluate to the correct type when using null [GH-21957]
* core: Prevent crash when a resource has no current valid instance ([#21979](https://github.com/hashicorp/terraform/issues/21979))
* plugin/sdk: Prevent empty strings from being replaced with default values ([#21806](https://github.com/hashicorp/terraform/issues/21806))
* plugin/sdk: Ensure resource timeouts are not lost when there is an empty plan ([#21814](https://github.com/hashicorp/terraform/issues/21814))
* plugin/sdk: Don't add null elements to diagnostic paths when validating config ([#21884](https://github.com/hashicorp/terraform/issues/21884))
* lang/funcs: Add missing map of bool support for `lookup`([#21863](https://github.com/hashicorp/terraform/issues/21863))
* config: Fix issue with downloading BitBucket modules from deprecated V1 API by updating go-getter dependency ([#21948](https://github.com/hashicorp/terraform/issues/21948))
* config: Fix conditionals to evaluate to the correct type when using null ([#21957](https://github.com/hashicorp/terraform/issues/21957))