Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix a bug with the release of section's raw data. Both release loops
were using translated data linked list, leading to a memory leak.

Jkoshy's testsuite was used to check for non-regression.

MFP4: Add an implementation of the ELF(3) and GELF(3) API set.

Bump __FreeBSD_version.

Reviewed by: jb