Gregory Nutt 266849549a libs/libc/netdb/lib_dnsaddserver.c: Fix wrong fopen() mode.
dns_add_nameserver(): As reported by Surya Prakash Verma, call to
fopen() used nonexistent file open mode "at"; changed this to "r"
per Surya's analysis. See Surya's email to dev@ on 12 Mar 2020,
archived here: https://lists.apache.org/thread.html/rbbbee93f79dd8f4224969bb03bf093d8c96421380a1d955167a2f661%40%3Cdev.nuttx.apache.org%3E
2020-03-14 01:19:11 +01:00
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