some utf-8-encoded unicode in source file are not mbcs-interchangeable

[freemine]

as such, it does not compile under windows for codepage (936, 1252,...).

for instance, lib/core-net/client/connect3.c

		/*
		 * If the connection failed, the OS-level errno may be
		 * something like EINPROGRESS rather than the actual problem
		 * that prevented a connection. This value will represent the
		 * “real” problem that we should report to the caller.
		 */
		int real_errno = 0;

quote mark in “real” can not be converted to cp936/cp1252