shareonline_biz (download): fix premium download

See also issue 1008
core.sh (parse_form_input_by_type, grep_form_by_{name,id}): fix parsing

Previously, parsing would also match if the searched 'id'/'name'
was a substring of the actual one.

This is a completion of commit:
core.sh (parse_form_input_by_{name,id}): fix parsing
revision bdc15a2d2f346b50e57cd8c628bdf68b1b22ca73
plowup: introduce $ERR_ASYNC_REQUEST error code

This is used to notify that asynchronous remote upload has started.
As we can't predict final status (or final link), we return this error code.
rapidgator, sockshare (upload): use new $ERR_ASYNC_REQUEST status
README: update modules using javascript
core.sh (process_configfile_options): fix sed error message

sed: can not read /etc/plowshare.conf: No such file or folder of this type

This regression was introduced in commit:
plow*: add --plowsharerc=<config file> command-line option
revision 14fb50c760d9ab714abfb3b51236fc0fadc4c9a4
multiupload: add (anonymous) download support

multiupload is a mirroring service but also hosts files.

+ fixes for upload
plowdown: drop -c/--check-link command line option

It is replaced by plowprobe.

Changes:
- modules: drop CHECK_LINK tests
- documentation updated
zippyshare: add upload account support

Dropped --private module command line switch because it does nothing!
Fixes issue 939.
core.sh (log_report_info): add $LIBDIR report
core.sh (captcha_process): 9kweu increase timeout

Add 30 more seconds..
10+6+6+7+7+8+8+9+9+10+10+20+20+20+30+30+30=240

Fixes issue 1010.
plow*: cosmetics, rephrase some help content
core.sh (captcha_process): 9kweu increase timeout [take 2]

Forget to see timeout parameter. In worst case, last curl request would get timeout error.

See first half:
revision cef1684996fb4e935147823b7c3cd417a07b40ab

Fixes issue 1010.
plow*: cosmetics, harmonize help usage message

Adoped "file sharing website" expression.
plow*: add --modules command line option to list available module names

Changes:
- as it is dedicated to wrappers scripts --module has not been added to bash completion
- man pages documentation updated
- plowdown: drop --get-module command line option. Use plowprobe --get-module instead
multiupload (upload): add --count module command line switch
ultramegabit.com: new module

Fixes issue 1006.
plowlist: when --fallback is used, exclude links from same domain url (given as argument)
core.sh (basename_url): doc fix
man page (plowprobe.1): minor, reorder --follow and --get-module options