Adapt to the new environ_xxx functions from oblibs

src/66/66-shutdownd.c

src/lib66/environ/env_clean_with_comment.c

src/lib66/exec/ssexec_boot.c

src/lib66/exec/ssexec_scandir_signal.c

src/lib66/module/regex_configure.c

src/lib66/module/regex_get_file_name.c

src/lib66/module/regex_get_regex.c

src/lib66/module/regex_get_replace.c

src/lib66/module/regex_rename.c

src/lib66/module/regex_replace.c