Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/common/filetime.h

@@ -34,11 +34,11 @@
 
 
 /* This module works around bugs in the time conversion code supplied by
- * Microsoft. The problem described here:
- *   http://www.codeproject.com/KB/datetime/dstbugs.aspx
- * is also true when setting file times via utime(), so we need a
- * replacement
- */
+** Microsoft. The problem described here:
+**   http://www.codeproject.com/KB/datetime/dstbugs.aspx
+** is also true when setting file times via utime(), so we need a
+** replacement
+*/
 
 
 
@@ -59,9 +59,9 @@
 
 int SetFileTimes (const char* Path, time_t T);
 /* Set the time of last modification and the time of last access of a file to
- * the given time T. This calls utime() for system where it works, and applies
- * workarounds for all others (which in fact means "WINDOWS").
- */
+** the given time T. This calls utime() for system where it works, and applies
+** workarounds for all others (which in fact means "WINDOWS").
+*/