fwget: Silence log() when -q is used

Summary:
Silence log function when -q parameter is used to prevent undesired output

PR: 283939
Reviewed By: manu
Differential Revision: https://reviews.freebsd.org/D48391
Sponsored by: Rubicon Communications, LLC ("Netgate")

(cherry picked from commit 19a6bc9f51e5c5705a2b396b0da61e6536acb4cb)