Update comments in src/rpc* to be doxygen compatible
qt: Make askpassphrase dialog behave more sanely

Set minimum sizes appropriately, and make sure that they
are enforced. Replaces #5226.
Merge pull request #5320

e0a25c5 qt: Make askpassphrase dialog behave more sanely (Wladimir J. van der Laan)
Merge pull request #5324

72fb3d2 Update comments in src/rpc* to be doxygen compatible (Michael Ford)
Split up crypto/sha2
Add HMAC-SHA256
Add the RFC6979 PRNG
Deterministic signing
Header define style cleanups