and other cosmetic fixes

For absolute path use ftp://foo.bar//usr/local/etc/filename
-This line, and those below, will be ignored--

M    modules/access/ftp.c

(will be needed by a later commit)

- Remove a dynamic allocation

with EPSV compliant NAT
- Fix socket error value check

(da big courmischage)

(RFC2428 - FTP Extensions for IPv6 and NATs) :
- explicitly NAT-friendly FTP (refs #66),
- IPv6 support (closes #130).

Sorry for the trouble

* Each module can declare a "human-readable short name" with set_name
* Modules are sorted by category (set_category, set_subcategory).
  Modules configs can be separated by set_section()
* Separated audio-filter and audio-visual
* Separated extraintf and control
* New command and widget : add_module_list() for comma-separated modules
* Vfilters now use "," as separator

* Add ACCESS_SET_PRIVATE_ID_STATE to the list of every access plugin
* msg_Err -> msg_Warn for unimplemented Control queries

 * access/vcd/ clean up.

ACCESS_GET_EOF/SIZE/POS, prepared title/seekpoint support).

 * ftp: converted to access2.

* modules/access/*: strings review + coding style fixes.

 * modules/access/ftp.c: cleaned up.

setting (in fact only used by access_out/udp.c.

* ALL: Capitalize all preferences text strings

vasprintf if defined but not declared in the system headers...)

* modules/access/ftp.c, modules/access/http.c: slightly changed atoll() replacement.