add Alexey Degtyarev to contributors for many ports:

databases/mysqlbackup
devel/awscli
devel/p5-Proc-WaitStat
devel/py-bcdoc
devel/py-botocore
devel/py-colorama
devel/py-jmespath
devel/rubygem-getopt
devel/rubygem-unicode
mail/mime-construct
mail/roundcube-mobilecube
mail/sa-stats
mail/sieve-connect
net-mgmt/percona-monitoring-plugins
net/ldap-stats
www/trac-wikigoodies