+## config=xxxx
+
+Load options from the given config file
+
+This can be used instead of arguments on the command line.
+
+Example:
+
+ afb-daemon \
+ --no-ldpaths \
+ --binding /home/15646/bindings/binding45.so \
+ --binding /home/15646/bindings/binding3.so \
+ --tracereq common \
+ --port 5555 \
+ --token SPYER \
+ --set api45/key:54027a5e3c6cb2ca5ddb97679ce32f185b067b0a557d16a8333758910bc25a72 \
+ --exec /home/15646/bin/test654 @p @t
+
+is equivalent to:
+
+ afb-daemon --config /home/15646/config1
+
+when the file **/home/15646/config1** is:
+
+ {
+ "no-ldpaths": true,
+ "binding": [
+ "\/home\/15646\/bindings\/binding45.so",
+ "\/home\/15646\/bindings\/binding3.so"
+ ],
+ "tracereq": "common",
+ "port": 5555,
+ "token": "SPYER",
+ "set" : {
+ "api45": {
+ "key": "54027a5e3c6cb2ca5ddb97679ce32f185b067b0a557d16a8333758910bc25a72"
+ }
+ },
+ "exec": [
+ "\/home\/15646\/bin\/test654",
+ "@p",
+ "@t"
+ ]
+ }
+
+The options are the keys of the config object.
+
+See option --dump-config
+
+## dump-config
+
+Output a JSON representation of the configuration resulting from
+environment and options.
+
+## output=xxxx
+
+Redirect stdout and stderr to output file
+
+## set=xxxx
+
+Set values that can be retrieved by bindings.
+
+The set value can have different formats.
+
+The most generic format is **{"API1":{"KEY1":VALUE,"KEY2":VALUE2,...},"API2":...}**
+
+This example set 2 keys for the api *chook*:
+
+ afb-daemon -Z --set '{"chook":{"account":"urn:chook:b2ca5ddb97679","delay":500}}'
+ {
+ "set": {
+ "chook": {
+ "account": "urn:chook:b2ca5ddb97679",
+ "delay": 500
+ }
+ }
+ }
+
+An other format is: **[API]/[KEY]:VALUE**.
+When API is omitted, it take the value "*".
+When KEY is ommitted, it take the value of "*".
+
+The settings for the API \* are globals and apply to all bindings.
+
+The settings for the KEY \* are mixing the value for the API.
+
+The following examples are all setting the same values:
+
+ afb-daemon --set '{"chook":{"account":"urn:chook:b2ca5ddb97679","delay":500}}'
+ afb-daemon --set 'chook/*:{"account":"urn:chook:b2ca5ddb97679","delay":500}'
+ afb-daemon --set 'chook/:{"account":"urn:chook:b2ca5ddb97679","delay":500}'
+ afb-daemon --set 'chook/account:"urn:chook:b2ca5ddb97679"' --set chook/delay:500
+