v9.5.0.22 Micro Update: HTTP User-Agent, Accept-Charset, and Accept Headers

Changes in HTTP:

• Updated the User-Agent default to that of latest Firefox (ChilkatHttpUA no longer used because browsers may respond in unexpected ways.)
• The Accept-Charset header is no longer added by default. (The Http.AcceptCharset property is empty by default.)
• The http.Accept property default is now “text/html,application/xhtml+xml,application/xml;q=0.9,* / *;q=0.8”