Add force_take function to ignore poisoned cache

The take and take_blocking functions return a PoisonError if the cache
is poisoned, i. e. if a thread panicked while holding the manager.  This
is a sensible default behaviour, but for example during testing, one
might want to ignore the poisoned cache.  This patch adds the force_take
function that unwraps the PoisonError and returns the cached Manager
even if the cache was poisoned.

1 files changed, 2 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 06769bd..b779929 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -46,6 +46,8 @@ SPDX-License-Identifier: MIT
   - Add the `Manager` struct that manages connections to Nitrokey devices.
   - Remove `connect`, `connect_model`, `Pro::connect` and `Storage::connect`.
   - Add the `into_manager` function to the `Device` trait.
+  - Add the `force_take` function that ignores a `PoisonError` when accessing
+    the manager instance.
 
 # v0.3.4 (2019-01-20)
 - Fix authentication methods that assumed that `char` is signed.