add "F" key to toggle new "freeze_files" option

Excerpt from man page:

Toggle "freeze_files" setting.  When active, directories and files will
not be loaded, improving performance when all the files you need are
already loaded.  This does not affect file previews, which can be
toggled with "zI".

1 files changed, 12 insertions, 1 deletions

diff --git a/doc/ranger.1 b/doc/ranger.1
index 045d8b95..4c8267f2 100644
--- a/doc/ranger.1
+++ b/doc/ranger.1
@@ -129,7 +129,7 @@
 .\" ========================================================================
 .\"
 .IX Title "RANGER 1"
-.TH RANGER 1 "ranger-1.9.0b5" "2017-06-16" "ranger manual"
+.TH RANGER 1 "ranger-1.9.0b5" "07/16/2017" "ranger manual"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -489,6 +489,12 @@ Move up and down in the parent directory.
 .IP "^R" 14
 .IX Item "^R"
 Reload everything
+.IP "F" 14
+.IX Item "F"
+Toggle \fIfreeze_files\fR setting.  When active, directories and files will not be
+loaded, improving performance when all the files you need are already loaded.
+This does not affect file previews, which can be toggled with \fIzI\fR.  Also try
+disabling the preview of directories with \fIzP\fR.
 .IP "^L" 14
 .IX Item "^L"
 Redraw the screen
@@ -767,6 +773,11 @@ currently running tasks which support progress bars?
 Flush the input after each key hit?  One advantage is that when scrolling down
 with \*(L"j\*(R", ranger stops scrolling instantly when you release the key.  One
 disadvantage is that when you type commands blindly, some keys might get lost.
+.IP "freeze_files [bool] <F>" 4
+.IX Item "freeze_files [bool] <F>"
+When active, directories and files will not be loaded, improving performance
+when all the files you need are already loaded.  This does not affect file
+previews.
 .IP "hidden_filter [string]" 4
 .IX Item "hidden_filter [string]"
 A regular expression pattern for files which should be hidden.  For example,