mything/ will make the OS resolve various hosts: mything., mything.local (mDNS), mything.whateverdomainyourhomenetworkuses. (which may be what you wanted).
If you want to be sure, use mything./ : the . at the end makes sure no further domains are appended during DNS lookup, and the / makes the browser try to access to resource without Googling it.
If you want to be sure, use mything./ : the . at the end makes sure no further domains are appended during DNS lookup, and the / makes the browser try to access to resource without Googling it.