Kyle Evans 3a166b3323 yp*: fix -fno-common build
This is mostly two problems spread out far and wide:
- ypldap_process should be declared properly
- debug is defined differently in many programs

For the latter, just extern it and define it everywhere that actually needs
it. This mostly works out nicely for ^/libexec/ypxfr, which can remove the
assignment at the beginning of main in favor of defining it properly.

-fno-common will become the default in GCC10/LLVM11.

MFC after:	3 days
2020-04-06 23:16:05 +00:00
..
2019-12-11 17:37:53 +00:00
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