Fix the siteconfig.tcl file of the log-module-command cookbook recipe
not to break when a file is sourced through cmdModuleSource. Limit the
addition of the 'auto' log field only if load evaluation comes from
cmdModuleLoad procedure.
Fixes#453
Improve the *Log module commands* cookbook to rely on the `trace` Tcl
command to track every modulefile evaluation and module/ml procedure
calls.
Fixes#412.
Code to handle the internal states of modulecmd have been reworked on
Modules v4.6. As a consequence several siteconfig.tcl extension scripts
described on documentation recipes have to be adapted.
Closes#396
