Update mod_radius to use pr_str_get_duration() for parsing timeout strings
for the RadiusAuthServer and RadiusAcctServer directives.  Fixed stylistic
nits while there.
More stylistic nits; clean up warnings found by clang.
Merge pull request #2 from proftpd/radius-timeout-parsing

Update mod_radius to use pr_str_get_duration() for parsing timeout strin...