"AM" 9.4: support for FreeBSD (#1209)

* fix issue with grep

* replace `-printf` in find with posix alternative

* remove strings dependency

* fix total size

* fix wrong apps number in -f

* improve warnings for missing $BINDIR in $PATH / ro $APPSPATH

* refactoring

* fix "--launcher" and "nolibfuse"

* make "less" optional

* remove bashisms (#1219)

* change `$TERM` for bsd systems

* fix bug with sanity checks and stop using `sed -i` in `sandboxes.am`

* workaround bsd sed when there is no gsed

* only apply patches when sed is broken

* make sure we have `file`

* drop lowercase `$arch`

* prevent installation if command exists & change check for existing binary only in `/usr/local/bin`

* improve metapackages check

* change counter for posix alternative

* fix version check for autoupdatable apps

* fix version update for autoupdatable apps across privileges levels

* prevent installation of libfuse2 if /usr/local/lib/libfuse.so.2 exists

* fix version in "tor-browser"

* Update APP-MANAGER

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Co-authored-by: Samuel <[email protected]>