tools/check-manpage.sh: make it work on FreeBSD.

Extended regular expressions are more compatible, it seems (and simpler!).

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

tools/check-manpage.sh

@@ -30,7 +30,7 @@ get_cmd_opts()
 CMD_OPTNAMES=$(get_cmd_opts "$1" | sort)
 
 # Now, gather (long) opt names from man page, make sure they match.
-MAN_OPTNAMES=$(sed -n 's/^\*\(--\)\?\([^*/]*\)\*\(=\?\).*::/\2\3/p' < "$2" | sort)
+MAN_OPTNAMES=$(sed -E -n 's/^\*(--)?([^*/]*)\*(=?).*::/\2\3/p' < "$2" | sort)
 
 if [ "$CMD_OPTNAMES" != "$MAN_OPTNAMES" ]; then
     echo "diff of command names vs manpage names":