Describe separate keymaster config file in docs
Describe separate keymaster config file in docs

The use of a separate keymaster config file was previously only
described in the context of the kms_keymaster middleware. This patch
adds a section to the simple keymaster middleware docs.

Change-Id: Ifa3ad9d6e892b81c52df1f6666a9881042ac60bd

openstack/swift,swiftstack/swift,tipabu/swift,swiftstack/swift,tipabu/swift,swiftstack/swift,tipabu/swift,openstack/swift,openstack/swift,tipabu/swift,openstack/swift