Move file reading outside limit function

Makes it easier to see explicitly how date is obtained.

As a bous, it will be also easier to parametrize limits.

bin/notifirc

     }
 }
 
-read_file() {
-    local fpath=$1
+trim() {
     local limit_l=3
     local limit_c=80
     local lines_read=0
     local suff=""
-    grep . "$fpath" \
-      | while true;
-        do
-            test $lines_read -ge $limit_l && break
-            IFS= read line || break
-            (( lines_read++ ))
-            test ${#line} -gt $limit_c && suff=…
-            line=${line:0:$limit_c}$suff
-            log "read from $fpath: $line"
-            echo "$line"
-        done
+    while true;
+    do
+        test $lines_read -ge $limit_l && break
+        IFS= read line || break
+        (( lines_read++ ))
+        test ${#line} -gt $limit_c && suff=…
+        line=${line:0:$limit_c}$suff
+        echo "$line"
+    done
 }
 
 choose_logfile() {
     log "message='$message'"
     {
         test -n "$message" && printf '%s\n' "$message"
-        test -n "$msgfile" && read_file "$msgfile"
+        test -n "$msgfile" && grep . "$msgfile" | trim
     } \
       | mkcommands "$user" "$(mknick)" \
       | nc "$host" "$port" 2>&1 \