lib/sh/util.sh: renamed cmd_indent to just indent now that indent is not being used for the PS4 level

*{.sh,run}: multi-command aliases: enclose in {} so the alias can be used after ||

lib/sh/util.sh: renamed indent->PS4++ , outdent->PS4-- because these relate just to the PS4 length, not to the (whitespace-based) log_indent

lib/sh/util.sh: removed no longer used echo_run(). use command() instead.

*{.sh,run}: use command instead of deprecated echo_run (don't prepend anything when the command is already aliased with `command`)

lib/sh/util.sh: command(): perform echo_run_prep itself instead of requiring echo_run to be added in an alias. echo_run_prep will not be performed if limit_stderr_cmd() has performed it already outside the limit_stderr section. this requires using `builtin command` instead of "command" when you don't want the echoing (such as in include_guard_var()).

*{.sh,run}: multi-command aliases: enclose in {} so the alias can be used after ||

bugfix: lib/sh/util.sh: .(): also need to echo the . before the included file

lib/sh/util.sh: added echo_params alias and use it instead of `log "$*"`

lib/sh/util.sh: .(): echo the include at log_level 2 because it's an internal command