Add a configuration reference page

doc/src/SUMMARY.md

@@ -12,6 +12,11 @@
 
  - [Not ready for production]()
 
+# Reference
+
+- [Configuration file](./config.md)
+- [RFC coverage](./rfc.md)
+
 # Design
 
 - [Overview](./overview.md)
@@ -19,9 +24,9 @@
 - [Mutation Log](./log.md)
 - [IMAP UID proof](./imap_uid.md)
 
-# Reference
+# Internals
 
-- [Data format](./data_format.md)
+- [Persisted data structures](./data_format.md)
 - [Cryptography & key management](./crypt-key.md)
 
 # Development

doc/src/config.md

@@ -0,0 +1,126 @@
+# Configuration file
+
+A configuration file that illustrate all the possible options,
+in practise, many fields are omitted:
+
+```toml
+s3_endpoint = "s3.garage.tld"
+k2v_endpoint = "k2v.garage.tld"
+aws_region = "garage"
+
+[lmtp]
+bind_addr = "[::1]:2525"
+hostname = "aerogramme.tld"
+
+[imap]
+bind_addr = "[::1]:993"
+
+[login_static]
+default_bucket = "aerogramme"
+
+[login_static.user.alan]
+email_addresses = [
+  "alan@smith.me"
+  "aln@example.com"
+]
+password = "$argon2id$v=19$m=4096,t=3,p=1$..."
+
+aws_access_key_id = "GK..."
+aws_secret_access_key = "c0ffee"
+bucket = "aerogramme-alan"
+
+user_secret = "s3cr3t"
+alternate_user_secrets = [ "s3cr3t2" "s3cr3t3" ]
+
+master_key = "..."
+secret_key = "..."
+
+[login_ldap]
+ldap_server = "ldap.example.com"
+
+pre_bind_on_login = true
+bind_dn = "cn=admin,dc=example,dc=com"
+bind_password = "s3cr3t"
+
+search_base = "ou=users,dc=example,dc=com"
+username_attr = "cn"
+mail_attr = "mail"
+
+aws_access_key_id_attr = "garage_s3_access_key"
+aws_secret_access_key_attr = "garage_s3_secret_key"
+user_secret_attr = "secret"
+alternate_user_secrets_attr = "secret_alt"
+
+# bucket = "aerogramme"
+bucket_attr = "bucket"
+
+```
+
+## Global configuration options
+
+### `s3_endpoint`
+
+### `k2v_endpoint`
+
+### `aws_region`
+
+## LMTP configuration options
+
+### `lmtp.bind_addr`
+
+### `lmtp.hostname`
+
+## IMAP configuration options
+
+### `imap.bind_addr`
+
+## Static login configuration options
+
+### `login_static.default_bucket`
+
+### `login_static.user.<name>.email_addresses`
+
+### `login_static.user.<name>.password`
+
+### `login_static.user.<name>.aws_access_key_id`
+
+### `login_static.user.<name>.aws_secret_access_key`
+
+### `login_static.user.<name>.bucket`
+
+### `login_static.user.<name>.user_secret`
+
+### `login_static.user.<name>.master_key`
+
+### `login_static.user.<name>.secret_key`
+
+## LDAP login configuration options
+
+### `login_ldap.ldap_server`
+
+### `login_ldap.pre_bind_on`
+
+### `login_ldap.bind_dn`
+
+### `login_ldap.bind_password`
+
+### `login_ldap.search_base`
+
+### `login_ldap.username_attr`
+
+### `login_ldap.mail_attr`
+
+### `login_ldap.aws_access_key_id_attr`
+
+### `login_ldap.aws_secret_access_key_attr`
+
+### `login_ldap.user_secret_attr`
+
+### `login_ldap.alternate_user_secrets_attr`
+
+### `login_ldap.bucket`
+
+### `login_ldap.bucket_attr`
+
+
+

doc/src/rfc.md

@@ -0,0 +1,3 @@
+# RFC coverage
+
+*Not yet written*