Fix spelling mistakes in comments and descriptions

Thanks, codespell!

plugins/solaris/fsstat_act_

@@ -62,11 +62,11 @@ stat_regexp='/^(?!(class|crtime|snaptime|.*_bytes))/'
 
 # Graph settings
 global_attr="
-    graph_title File system statictics - Activities of $( echo "$fs_type" | tr '[:lower:]' '[:upper:]' )
+    graph_title File system statistics - Activities of $( echo "$fs_type" | tr '[:lower:]' '[:upper:]' )
     graph_category disk
     graph_args --base 1000
     graph_vlabel Counts per second
-    graph_info File system statictics - Activities of $( echo "$fs_type" | tr '[:lower:]' '[:upper:]' )
+    graph_info File system statistics - Activities of $( echo "$fs_type" | tr '[:lower:]' '[:upper:]' )
 "
 
 # Functions

plugins/solaris/fsstat_bytes

@@ -22,7 +22,7 @@
 
 =head1 ENVIRONMENT VARIABLES
 
-  env.exclude - file system(s) to exclude seperated by white-space.
+  env.exclude - file system(s) to exclude separated by white-space.
     example:  env.exclude  autofs
     default:  none
 
@@ -53,11 +53,11 @@ name_regexp='/^vopstats_(?![0-9a-f]{7})[a-z]/'  # data source of fsstat
 
 # Set graph settings
 global_attr="
-    graph_title File system statictics - I/O throughput
+    graph_title File system statistics - I/O throughput
     graph_category disk
     graph_args --base 1024
     graph_vlabel Bytes per second write (-) / read (+)
-    graph_info File system statictics - I/O throughput
+    graph_info File system statistics - I/O throughput
 "
 data_in=read_bytes
 data_out=write_bytes

plugins/solaris/io_disk

@@ -60,7 +60,7 @@
     example:  env.title_type  Disk Device, NFS, Tape
     default:  Disk Device
 
-  env.exclude - Device instance name(s) to exclude seperated by white-space.
+  env.exclude - Device instance name(s) to exclude separated by white-space.
     example:  env.exclude  sd0 ssd1
     default:  none