core (curl): don't limit number of redirections if user already did
uploading (download): add curl redirection to handle more url variant
core.sh (process_configfile_*): use "read -r"

-r switch means: backslash does not act as an escape character.
core.sh (list_submit): use mapfile (Bash 4+)
docs (man pages): fix plowshare.conf.5 (plowprobe addition)
core.sh (process_configfile_*): enhance config file management

Changes:
- first letter of section name can be lowercase
- section order in plowshare.conf is no longer relevant
- don't use grep anymore (sed still used)
- leading blank before module option is now accepted
- man page (plowshare.conf.5): tiny update
rapidshare (download): consider "Filename invalid" as dead link
setup.sh: fix install for BSD users

core.sh was patched but not download.sh & probe.sh
uploaded_net (download): put 2 hours interval between two uploaded.net links
modules: minor, fix 2013 copyrights
setup.sh: minor, comment fix