<arpa/nameser.h>: fix INTRODUCED_IN API level.

Historical research (see bug) suggests that these functions were all in
22. The map file believed this with one (presumably typoed) exception,
but the header file didn't match the map file. It looks like the map was
correct (modulo the one typo), so fix up all the disagreement.

Bug: http://b/113618851
Test: treehugger
Change-Id: Ia579f4e6163206abfac79aa54dc98c792f00ee86
diff --git a/libc/include/arpa/nameser.h b/libc/include/arpa/nameser.h
index e0b5c45..89ece1c 100644
--- a/libc/include/arpa/nameser.h
+++ b/libc/include/arpa/nameser.h
@@ -591,33 +591,29 @@
 /* The names of these symbols were accidentally prefixed with __ in L. */
 /* The duplication here is intentional to avoid declaring different symbols with the same
  * declaration. */
-int ns_msg_getflag(ns_msg __handle, int __flag) __INTRODUCED_IN_64(23);
-uint16_t ns_get16(const u_char* __src) __INTRODUCED_IN_64(23);
-uint32_t ns_get32(const u_char* __src) __INTRODUCED_IN_64(23);
-void ns_put16(uint16_t __src, u_char* __dst) __INTRODUCED_IN_64(23);
-void ns_put32(uint32_t __src, u_char* __dst) __INTRODUCED_IN_64(23);
-int ns_initparse(const u_char* __msg, int __msg_size, ns_msg* __handle) __INTRODUCED_IN_64(23);
-int ns_skiprr(const u_char* __ptr, const u_char* __eom, ns_sect __section, int __count) __INTRODUCED_IN_64(23);
-int ns_parserr(ns_msg* __handle, ns_sect __section, int __rr_number, ns_rr* __rr) __INTRODUCED_IN_64(23);
-int ns_sprintrr(const ns_msg* __handle, const ns_rr* __rr, const char* __name_ctx, const char* __origin, char* __buf, size_t __buf_size)
-  __INTRODUCED_IN_64(23);
-int ns_sprintrrf(const u_char* __msg, size_t __msg_size, const char* __name, ns_class __class, ns_type __type, u_long __ttl, const u_char* __rdata, size_t __rdata_size, const char* __name_ctx, const char* __origin, char* __buf, size_t __buf_size) __INTRODUCED_IN_64(23);
-int ns_format_ttl(u_long __ttl, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(23);
-int ns_name_ntol(const u_char* __src, u_char* __dst, size_t __dst_size) __INTRODUCED_IN_64(23);
-int ns_name_ntop(const u_char* __src, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(23);
-int ns_name_pton(const char* __src, u_char* __dst, size_t __dst_size) __INTRODUCED_IN_64(23);
-int ns_name_unpack(const u_char* __msg, const u_char* __eom, const u_char* __src, u_char* __dst, size_t __dst_size)
-  __INTRODUCED_IN_64(23);
-int ns_name_pack(const u_char* __src, u_char* __dst, int __dst_size, const u_char** __dn_ptrs, const u_char** __last_dn_ptr) __INTRODUCED_IN_64(23);
-int ns_name_uncompress(const u_char* __msg, const u_char* __eom, const u_char* __src, char* __dst, size_t __dst_size)
-  __INTRODUCED_IN_64(23);
-int ns_name_compress(const char* __src, u_char* __dst, size_t __dst_size, const u_char** __dn_ptrs, const u_char** __last_dn_ptr)
-  __INTRODUCED_IN_64(23);
-int ns_name_skip(const u_char** __ptr_ptr, const u_char* __eom) __INTRODUCED_IN_64(23);
-void ns_name_rollback(const u_char* __src, const u_char** __dn_ptrs, const u_char** __last_dn_ptr) __INTRODUCED_IN_64(23);
+int ns_msg_getflag(ns_msg __handle, int __flag) __INTRODUCED_IN_64(22);
+uint16_t ns_get16(const u_char* __src) __INTRODUCED_IN_64(22);
+uint32_t ns_get32(const u_char* __src) __INTRODUCED_IN_64(22);
+void ns_put16(uint16_t __src, u_char* __dst) __INTRODUCED_IN_64(22);
+void ns_put32(uint32_t __src, u_char* __dst) __INTRODUCED_IN_64(22);
+int ns_initparse(const u_char* __msg, int __msg_size, ns_msg* __handle) __INTRODUCED_IN_64(22);
+int ns_skiprr(const u_char* __ptr, const u_char* __eom, ns_sect __section, int __count) __INTRODUCED_IN_64(22);
+int ns_parserr(ns_msg* __handle, ns_sect __section, int __rr_number, ns_rr* __rr) __INTRODUCED_IN_64(22);
+int ns_sprintrr(const ns_msg* __handle, const ns_rr* __rr, const char* __name_ctx, const char* __origin, char* __buf, size_t __buf_size) __INTRODUCED_IN_64(22);
+int ns_sprintrrf(const u_char* __msg, size_t __msg_size, const char* __name, ns_class __class, ns_type __type, u_long __ttl, const u_char* __rdata, size_t __rdata_size, const char* __name_ctx, const char* __origin, char* __buf, size_t __buf_size) __INTRODUCED_IN_64(22);
+int ns_format_ttl(u_long __ttl, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_ntol(const u_char* __src, u_char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_ntop(const u_char* __src, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_pton(const char* __src, u_char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_unpack(const u_char* __msg, const u_char* __eom, const u_char* __src, u_char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_pack(const u_char* __src, u_char* __dst, int __dst_size, const u_char** __dn_ptrs, const u_char** __last_dn_ptr) __INTRODUCED_IN_64(22);
+int ns_name_uncompress(const u_char* __msg, const u_char* __eom, const u_char* __src, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_name_compress(const char* __src, u_char* __dst, size_t __dst_size, const u_char** __dn_ptrs, const u_char** __last_dn_ptr) __INTRODUCED_IN_64(22);
+int ns_name_skip(const u_char** __ptr_ptr, const u_char* __eom) __INTRODUCED_IN_64(22);
+void ns_name_rollback(const u_char* __src, const u_char** __dn_ptrs, const u_char** __last_dn_ptr) __INTRODUCED_IN_64(22);
 
-int ns_makecanon(const char* __src, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(23);
-int ns_samename(const char* __lhs, const char* __rhs) __INTRODUCED_IN_64(23);
+int ns_makecanon(const char* __src, char* __dst, size_t __dst_size) __INTRODUCED_IN_64(22);
+int ns_samename(const char* __lhs, const char* __rhs) __INTRODUCED_IN_64(22);
 #endif /* !defined(__LP64__) */
 
 __END_DECLS
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index b36ee4c..424c8f3 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -690,7 +690,7 @@
     ns_name_ntol; # arm64 x86_64 mips64 introduced=22
     ns_name_ntop; # arm64 x86_64 mips64 introduced=22
     ns_name_pack; # arm64 x86_64 mips64 introduced=22
-    ns_name_pton; # arm64 x86_64 mips64 introduced=23
+    ns_name_pton; # arm64 x86_64 mips64 introduced=22
     ns_name_rollback; # arm64 x86_64 mips64 introduced=22
     ns_name_skip; # arm64 x86_64 mips64 introduced=22
     ns_name_uncompress; # arm64 x86_64 mips64 introduced=22