Some documentation tweaks.

doc/snac.5

@@ -60,6 +60,8 @@ The base directory contains the following files and folders:
 Server configuration.
 .It Pa user/
 Directory holding user subdirectories.
+.It Pa archive/
+If this directory exists, all input and output messages are stored into.
 .El
 .Pp
 Each user directory is a subdirectory of 
@@ -117,8 +119,7 @@ web interface.
 This directory contains generated HTML files. They may be snapshots of the
 local timeline in previous months or other cached data.
 .It Pa archive/
-This directory stores all input/output traffic of ActivityPub messages. There
-is a different file for each day. This information is only stored if
+This directory is no longer used in version 2.x and later. It can be deleted.
 .Nm
 is run with a debug level >= 1.
 .El

doc/snac.8

@@ -14,8 +14,16 @@ This is the admin manual. For user operation, see
 .Xr snac 1 .
 For file and data formats, see
 .Xr snac 5 .
-.Ss Installation
-Install the OpenSSL and urllib3 Python3 external packages, and run as root
+.Ss Building and Installation
+A C compiler must be installed in the system, as well as the development
+headers and libraries for OpenSSL and curl. To build
+.Nm ,
+run
+.Bd -literal -offset indent
+make
+.Ed
+.Pp
+And, after that, run as root
 .Bd -literal -offset indent
 make install
 .Ed
@@ -179,11 +187,6 @@ user's crontab:
 0 4 * * 0 /usr/local/bin/snac purge /path/to/snac-data
 .Ed
 .Pp
-Other directories, like
-.Pa archive/ ,
-can grow very quickly if the debug level is greater than 0. These
-files must be deleted manually.
-.Pp
 The user-generated data (the local timeline) is never deleted.
 .Ss ActivityPub Support
 These are the following activities and objects that