add SMB/CIFS server

setup.py

@@ -112,7 +112,10 @@ args = {
         "Programming Language :: Python :: Implementation :: PyPy",
         "Environment :: Console",
         "Environment :: No Input/Output (Daemon)",
+        "Intended Audience :: End Users/Desktop",
+        "Intended Audience :: System Administrators",
         "Topic :: Communications :: File Sharing",
+        "Topic :: Internet :: File Transfer Protocol (FTP)",
         "Topic :: Internet :: WWW/HTTP :: HTTP Servers",
     ],
     "include_package_data": True,
@@ -125,6 +128,7 @@ args = {
         "audiotags": ["mutagen"],
         "ftpd": ["pyftpdlib"],
         "ftps": ["pyftpdlib", "pyopenssl"],
+        "smbd": ["impacket"],
     },
     "entry_points": {"console_scripts": ["copyparty = copyparty.__main__:main"]},
     "scripts": ["bin/copyparty-fuse.py", "bin/up2k.py"],