OpenBSD doesn't have rawmemchr, use strchr

(closes issue ASTERISK-19758)
Reported by: Barry Miller
Tested by: Terry Wilson
Patches: 
  362758-diff uploaded by Barry Miller (license 5434)
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Merged revisions 362868 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 362869 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@363335 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/asterisk.c

@@ -1320,7 +1320,7 @@ static void *netconsole(void *vconsole)
 			/* If we get this far, we have left over characters that have not been processed.
 			 * Advance to the character after the last command read by ast_cli_command_multiple_full.
 			 * We are guaranteed to have at least cmds_read NULLs */
-			while (cmds_read-- && (start_read = rawmemchr(start_read, '\0'))) {
+			while (cmds_read-- && (start_read = strchr(start_read, '\0'))) {
 				start_read++;
 			}
 			memmove(inbuf, start_read, end_buf - start_read);