Factor out section loading into a separate function

[trasz]

Summary

Factor out section loading into a separate function.

[kib]

sys/kern/imgact_elf.c

680

Indentation looks weird, this is because the block span is wrong. numsegs++ should be done regardless of != NULL.

Perhaps rename numsegs to e.g. first_loadable and change type to boolean.

After that, you can move assignment of zero to *base_addrp after the loop.

[trasz]

Fixes from kib@.