add timeout flag to refresh

doc/comitium.1.scd

@@ -33,7 +33,7 @@ variety of feed formats:
 	automatically picked depending on the feed type. For Gemini feeds, the
 	first heading on a page is used as a title. For ATOM, RSS, and JSON feeds,
 	the provided title is used. For a page being watched for changes, the URL
-	itself is used.
+	itself is used.  Use *-w* to watch a page for changes.
 	Also to note: when adding a new subscription, you *do not* need to run
 	*refresh* afterwards, *add* will automatically fetch the entries and
 	regenerate the .gmi and .json files.
@@ -68,6 +68,10 @@ command-specific flags that are not universally recognized.
 	the servers you're hitting and to other people on your network. Defaults to
 	5.
 
+*-t* _NUM_, *--timeout* _NUM_
+	Set a timeout for requests, in seconds.  Defaults to 10 seconds per
+	request.
+
 ## ADD FLAGS
 
 *-w*, *--watch*
@@ -115,7 +119,9 @@ Within the data directory, the following files are used:
 *header.gmi*
 	This file is neither created nor modified by comitium.  If it exists and is
 	nonempty, then it is read and used as custom header for *feed.gmi*.  If it
-	doesn't exist or is empty, then a default header is used.
+	doesn't exist or is empty, then a default header is used.  The generated
+	contents of *feed.gmi* will be appended to the contents of *header.gmi*
+	separated by one newline.
 
 *feed.gmi*
 	The outputted text/gemini file containing the subscription items. Is what