-deprecatedrpc= (Usually deprecated features can be re-enabled during the grace-period of one major version via the -deprecatedrpc= command line option) marked as spelling problem

**What got flagged?**
deprecatedrpc

**Why is this incorrect?**
-deprecatedrpc= (Usually deprecated features can be re-enabled during the grace-period of one major version via the -deprecatedrpc= command line option. The release notes of a new major release come with detailed instructions on what RPC features were deprecated and how to re-enable them temporarily) marked as spelling problems.

**Example of correct usage:**
No spelling problems.

No file or test is named. Search the codebase for "deprecatedrpc" and inspect the spelling vocabulary or related regression tests; the work is done when this command-line term is no longer flagged as a spelling problem and the behavior is covered by a test.

Written by the indexing model from the issue text.