Add user uzsolt

Committer's Guide, steps for new committers, step 1.

Approved by:    bofh (mentor), diizzy (mentor)
Differential Revision:  https://reviews.freebsd.org/D43626

shared/authors.adoc

@@ -3476,6 +3476,10 @@
 :uqs-email: uqs@FreeBSD.org
 :uqs: {uqs-name} <{uqs-email}>
 
+:uzsolt-name: Zsolt Udvari
+:uzsolt-email: uzsolt@FreeBSD.org
+:uzsolt: {uzsolt-name} <{uzsolt-email}>
+
 :vangyzen-name: Eric van Gyzen
 :vangyzen-email: vangyzen@FreeBSD.org
 :vangyzen: {vangyzen-name} <{vangyzen-email}>