Fixed login printing raw passwdenc passwords to console (bugreport:826).

Added strlib function bin2hex().
Cleaned up the md5calc interface a bit.

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@13055 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/common/strlib.h

@@ -46,6 +46,10 @@ int safesnprintf(char* buf, size_t sz, const char* fmt, ...);
 /// Lines start at 1.
 int strline(const char* str, size_t pos);
 
+/// Produces the hexadecimal representation of the given input.
+/// The output buffer must be at least count*2+1 in size.
+/// Returns true on success, false on failure.
+bool bin2hex(char* output, unsigned char* input, size_t count);
 
 
 /// Bitfield determining the behaviour of sv_parse and sv_split.