| 1.3 |  | 17-Feb-2019 | rin | Bump default value of WARNS for modules from 3 to 5, and explicitly set WARNS for modules that fail with WARNS=5.
 
 Also, turn on -Wno-missing-noreturn for clang for some files.
 
 At the moment, among ~ 360 modules,
 - 2 (lua and zfs) need WARNS=0
 - 1 (solaris) needs WARNS=1
 - 136 need WARNS=3 (mostly due to sign-compare)
 - 4 need WARNS=4
 - others can be compiled with WARNS=5
 
 Discussed on tech-kern.
 
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