There will be some regressions, I used automatic sed replacement with manual
checks but there was a lot to change.
 It's only the first pass.

It had the following functions:
- text_style_New  -- allocates default text style
- text_style_Dup  -- allocates and copies text style
- text_style_Copy -- copies text style
- text_style_Delete -- deallocates text style

NOTE that the vout_ShowText* functions will take a p_style and copy
it internally so you have to free in the caller function.
 Other modules where p_style was malloced there are now fixed to
copy before calling the vout* functions.

Original patch by basOS G with a few modifications by fenrir.

Signed-off-by: Laurent Aimar <fenrir@videolan.org>

Colors are in RRGGBB format as stated in vlc_osd.h
int        i_outline_color;   /**< The color of the outline 0xRRGGBB */

Initial patch from Doug West.

Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

This improves readability a lot and prevent us from reinventing the wheel.

Don't compile dynamicoverlay when there is no POSIX shared memory support on the system. Use VLC_UNUSED() iso (void)().

Rewrite old command definitions to no longer use those filthy macros. Added all text functionality so the test application runs successfully.