new config option AvoidDiskWrites for people running tors on

usb keys and other media that degrades when you write.
not implemented yet, so just a reminder.


svn:r8331

src/or/config.c

@@ -131,6 +131,7 @@ static config_var_t _option_vars[] = {
   VAR("AuthDirReject",       LINELIST, AuthDirReject,        NULL),
   VAR("AuthDirRejectUnlisted",BOOL,    AuthDirRejectUnlisted,"0"),
   VAR("AuthoritativeDirectory",BOOL,   AuthoritativeDir,     "0"),
+  VAR("AvoidDiskWrites",     BOOL,     AvoidDiskWrites,      "0"),
   VAR("BandwidthBurst",      MEMUNIT,  BandwidthBurst,       "6 MB"),
   VAR("BandwidthRate",       MEMUNIT,  BandwidthRate,        "3 MB"),
   VAR("CircuitBuildTimeout", INTERVAL, CircuitBuildTimeout,  "1 minute"),

src/or/or.h

@@ -1429,6 +1429,8 @@ typedef struct {
   int VersioningAuthoritativeDir; /**< Boolean: is this an authoritative
                                    * directory that's willing to recommend
                                    * versions? */
+  int AvoidDiskWrites; /**< Boolean: should we never cache things to disk?
+                        * Not used yet. */
   int ClientOnly; /**< Boolean: should we never evolve into a server role? */
   int NoPublish; /**< Boolean: should we never publish a descriptor? */
   int PublishServerDescriptor; /**< Do we publish our descriptor as normal? */