They were marked as broken and disabled in 2009 and will never get fixed.

Also switch from "tbl" to "tab" name suffixes.

This helps grepping for functions, among other things.

The function is supposed to confirm that the compiler provided enough
alignment, but in practice it is only run in certain code paths and
insufficient alignment problems are restricted to legacy compilers.

SPARC is no longer being used in any multimedia-related fields and the
VIS optimizations only represent a maintenance burden.

SH4 has been end-of-lifed and no more test machines are available.

Previously, it was an implicit dependency through mpegvideo. Change
this, as implicit dependencies can cause all sorts of trouble.

ffv1 does not use any part of the dsputil framework.

Quite useful to select by pid in MPEG-TS.

The icy_metadata_headers string never gets initialized, so,
during the first call to av_strlcatf() in parse_icy(),
strlen() will be called on a pointer to uninitialized memory.
At best this causes some garbage data to be left at the
start of the string.

By initializing icy_metadata_headers to the empty string, the
first call to strlen() will always return 0, so that data is
appended from the start of the string.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>