setCookie used fixed key "JWTToken"

[newly12]

hi,

I have some questions..

• can this be configurable

	// set cookie
	if mw.SendCookie {
		maxage := int(expire.Unix() - time.Now().Unix())
		c.SetCookie(
			"JWTToken",
			tokenString,
			maxage,
			"/",
			mw.CookieDomain,
			mw.SecureCookie,
			mw.CookieHTTPOnly,
		)
	}

• in example, cookie is named as "jwt", kind of confusing and when copy the example code, it takes time to find out this inconsistence.

		TokenLookup: "header: Authorization, query: token, cookie: jwt",

[appleboy]

I will take it.

[appleboy]

Already add CookieName in jwt package.

[appleboy]

@newly12

gin-jwt/auth_jwt.go

Lines 126 to 127 in 7e28a7a

	// CookieName allow cookie name change for development
	CookieName string

[newly12]

@appleboy thanks for the prompt action