Startup: Raise open files ulimit (ticket #1967)

Fixup deb patch to match

debian/patches/0001-path-substitution.patch

@@ -76,7 +76,7 @@ Index: b/installer/resources/i2prouter
  
  # Priority at which to run the wrapper.  See "man nice" for valid priorities.
  #  nice is only used if a priority is specified.
-@@ -177,77 +168,8 @@ if [ ! -e "$WRAPPER_CONF" ]; then
+@@ -180,77 +171,8 @@ if [ ! -e "$WRAPPER_CONF" ]; then
         exit 1
  fi
  
@@ -154,7 +154,7 @@ Index: b/installer/resources/i2prouter
  if [ -n "$FIXED_COMMAND" ]
  then
      COMMAND="$FIXED_COMMAND"
-@@ -1068,7 +990,6 @@ startwait() {
+@@ -1078,7 +1000,6 @@ startwait() {
          if [ "X$pid" = "X" ]
          then
              eval echo " `gettext 'WARNING: $APP_LONG_NAME may have failed to start.'`"
@@ -162,7 +162,7 @@ Index: b/installer/resources/i2prouter
          else
              eval echo ' running: PID:$pid'
          fi
-@@ -1871,7 +1792,7 @@ showUsage() {
+@@ -1881,7 +1802,7 @@ showUsage() {
  }
  
  showsetusermesg()  {
@@ -171,7 +171,7 @@ Index: b/installer/resources/i2prouter
  }
  
  checkifstartingasroot() {
-@@ -1879,7 +1800,7 @@ checkifstartingasroot() {
+@@ -1889,7 +1810,7 @@ checkifstartingasroot() {
          echo "`gettext 'Running I2P as the root user is *not* recommended.'`"
          showsetusermesg
          echo
@@ -180,7 +180,7 @@ Index: b/installer/resources/i2prouter
          exit 1
      fi
  }
-@@ -1946,24 +1867,10 @@ docommand() {
+@@ -1981,24 +1902,10 @@ docommand() {
              status
              ;;
  

installer/resources/i2prouter

@@ -127,6 +127,9 @@ WAIT_FOR_STARTED_TIMEOUT=120
 # flag for using upstart when installing (rather than init.d rc.d)
 USE_UPSTART=
 
+# Raise the soft open files soft ulimit to this value, if able
+OPEN_FILES_ULIMIT=2048
+
 # Source the environment variables for the locale if $LANG isn't set
 # If you want to set custom locale variables for I2P,
 # you may comment out this block and set them yourself here.
@@ -1891,6 +1894,28 @@ checkifstartingasroot() {
     fi
 }
 
+raiseopenfilesulimit() {
+    OPEN_FILES_SOFT=`ulimit -S -n` 2> /dev/null || return
+    if [ "$OPEN_FILES_SOFT" != "unlimited" ]
+    then
+        if [ "$OPEN_FILES_ULIMIT" -gt "$OPEN_FILES_SOFT" ]
+        then
+            OPEN_FILES_HARD=`ulimit -H -n` 2> /dev/null || return
+            if [ "$OPEN_FILES_HARD" != "unlimited" ]
+            then
+                if [ "$OPEN_FILES_ULIMIT" -gt "$OPEN_FILES_HARD" ]
+                then
+                    OPEN_FILES_ULIMIT="$OPEN_FILES_HARD"
+                fi
+            fi
+            if [ "$OPEN_FILES_ULIMIT" -gt "$OPEN_FILES_SOFT" ]
+            then
+                ulimit -S -n "$OPEN_FILES_ULIMIT" > /dev/null 2>&1
+            fi
+        fi
+    fi
+}
+
 docommand() {
     case "$COMMAND" in
         'console')
@@ -1904,6 +1929,7 @@ docommand() {
 
         'start')
             checkifstartingasroot
+            raiseopenfilesulimit
             if [ "$DIST_OS" = "macosx" -a -f "/Library/LaunchDaemons/${APP_PLIST}" ] ; then
                 macosxstart
             elif [ "$DIST_OS" = "linux" -a -f "/etc/init/${APP_NAME}.conf" ] ; then
@@ -1930,6 +1956,7 @@ docommand() {
 
         'restart')
             checkifstartingasroot
+            raiseopenfilesulimit
             checkUser touchlock "$COMMAND"
             if [ ! -n "$FIXED_COMMAND" ] ; then
                 shift
@@ -1940,6 +1967,7 @@ docommand() {
 
         'condrestart')
             checkifstartingasroot
+            raiseopenfilesulimit
             checkUser touchlock "$COMMAND"
             if [ ! -n "$FIXED_COMMAND" ] ; then
                 shift