Making dnssec's README consistent with other plugins' READMEs
## Name
-*dnssec* - enable on-the-fly DNSSEC signing of served data.
+*dnssec* - enables on-the-fly DNSSEC signing of served data.
## Description
-With *dnssec* any reply that doesn't (or can't) do DNSSEC will get signed on the fly. Authenticated
+With *dnssec*, any reply that doesn't (or can't) do DNSSEC will get signed on the fly. Authenticated
denial of existence is implemented with NSEC black lies. Using ECDSA as an algorithm is preferred as
this leads to smaller signatures (compared to RSA). NSEC3 is *not* supported.
