First commit.

doc/dbformat.txt

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+
+Database is a regular Lua script that returns a table.
+
+Table has a single named field `timestamp' containing the time_t the
+DB was last saved. It's not used in the mod and is only meant for
+external use (I don't find filesystem timestamps too reliable).
+
+Next is a simple array (number indices) of entries.
+
+Each entry contains following fields:
+
+[1] = {
+	-- Names/IPs associated with this entry
+	names = {
+		["foo"] = true,
+		["bar"] = true,
+		["123.45.67.89"] = true,
+	},
+	banned = true,      -- Whether this user is banned
+	                    -- Other fields do not apply if false
+	time = 12341234,    -- Time of last ban (*1)
+	expires = 43214321  -- Time at which ban expires (*2)
+	                    -- If nil, permanent ban
+	reason = "asdf",    -- Reason for ban
+	source = "qwerty",  -- Source of ban (*2)
+	record = {
+		[1] = {
+			source = "asdf",
+			reason = "qwerty",
+			time = 12341234,
+			expires = 43214321,
+		},
+		[1] = {
+			source = "asdf",
+			reason = "Unbanned",  -- When unbanned
+			time = 12341234,
+		},
+	},
+}
+
+Notes:
+(*1)  All times are expressed in whatever unit `os.time()' uses
+      (`time_t' on most (all?) systems).
+(*2)  Mods using the xban API are advised to use the "modname:source"
+      format for `source' (for example: "anticheat:main").