add gopher wiki article

wiki/source/gopher.md

@@ -0,0 +1,59 @@
+---
+title: gopher
+author: benharri
+---
+
+tilde.club now serves gopher! we're using
+[gophernicus](https://github.com/gophernicus/gophernicus) as our
+gopherd.
+
+user pages are served from your `~/public_gopher` dirs and can be
+accessed at `gopher://tilde.club/1/~username`. note that the itemtype
+`1` is required.
+
+## basic gophermap syntax
+
+files named `gophermap` are the gopher equivalent to index.html. each
+line in a gophermap consists of the following parts separated by literal
+tab characters:
+
+-   item type
+-   display name
+-   selector
+-   host
+-   port
+
+for example:
+
+`1tildeclub<tab>/<tab>tilde.club<tab>70`
+
+basic item types include:
+
+-   `0` - text file
+-   `1` - directory
+-   `7` - search query
+-   `9` - binary file
+-   `g` - gif image
+-   `h` - html file
+-   `i` - info text
+-   `I` - generic image file (not a gif)
+
+gophernicus also supports the following special types:
+
+-   `#` - comment
+-   `!title` - only valid on the first line
+-   `-file` - hide file from listings
+-   `:ext=type` - change filetype
+-   `~` - include a list of users with a valid `~/public_gopher`
+-   `=mapfile` - include or execute a script or gophermap
+-   `-` - stop processing gophermap and include file listing
+
+-   `.` - stop processing gophermap (default)
+
+## additional resources
+
+see [gophernicus' gophermap
+documentation](https://github.com/gophernicus/gophernicus/blob/master/README.Gophermap)
+for more info on available item types and other special selectors.
+
+if you're completely new to gopher, check out the [gopher zone](https://gopher.zone)!