Merge pull request #136 from trapexit/typo

fix typo in README

README.md

@@ -23,7 +23,7 @@ Why create **mergerfs** when those exist? **mhddfs** has not been updated in som
 * **defaults** is a shortcut for **auto_cache**. **big_writes**, **atomic_o_trunc**, **splice_read**, **splice_write**, and **splice_move** are in effect also enabled (by asking **FUSE** internally for such features) but if unavailable will be ignored. These options seem to provide the best performance.
 * **minfreespace** (defaults to **4G**) is the minimum space value used for the **lfs**, **fwfs**, and **epmfs** policies. Understands 'K', 'M', and 'G' to represent kilobyte, megabyte, and gigabyte respectively.
 * All FUSE functions which have a category (see below) are option keys. The syntax being **func.<func>=<policy>**. Example: **func.getattr=newest**.
-* To set all function policies in a category use **categor.<category>=<policy>**. Example: **category.create=mfs**.
+* To set all function policies in a category use **category.<category>=<policy>**. Example: **category.create=mfs**.
 * Options are evaluated in the order listed so if the options are **func.rmdir=rand,category.action=ff** the **action** category setting will override the **rmdir** setting.
 
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