Clarify that the ELF library only sets the sh_entsize field of a section header entry if the application is not taking charge of ELF object layout.
Clarify that the ELF library only sets the sh_entsize field of a
section header entry if the application is not taking charge of ELF
object layout.

Update (c) years, and bump the manual page's date.

Submitted by:		kaiw

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