Fix 47 typos in user-facing help and error messages

(cherry picked from commit df9b2ea03efdf82c0eb6bb53ed9b128c1513a299)

src/lib/libcmd/chmod.c

@@ -36,7 +36,7 @@ USAGE_LICENSE
 	"of changes to make, or an octal number representing the bit "
 	"pattern for the new permissions.]"
 "[+?Symbolic mode strings consist of one or more comma separated list "
-	"of operations that can be perfomed on the mode. Each operation is of "
+	"of operations that can be performed on the mode. Each operation is of "
 	"the form \auser\a \aop\a \aperm\a where \auser\a is zero or more of "
 	"the following letters:]{"
 	"[+u?User permission bits.]"

src/lib/libcmd/head.c

@@ -50,10 +50,10 @@ USAGE_LICENSE
     "\anumber\a.]"
 "[n:lines?Copy \alines\a lines from each file.]#[lines:=10]"
 "[c:bytes?Copy \achars\a bytes from each file.]#[chars]"
-"[q:quiet|silent?Never ouput filename headers.]"
+"[q:quiet|silent?Never output filename headers.]"
 "[s:skip?Skip \askip\a characters or lines from each file before "
     "copying.]#[skip]"
-"[v:verbose?Always ouput filename headers.]"
+"[v:verbose?Always output filename headers.]"
     "\n\n"
 "[ file ... ]"
     "\n\n"

src/lib/libcmd/mktemp.c

@@ -35,7 +35,7 @@ USAGE_LICENSE
         "[+*?Lower case to avoid clashes on case ignorant filesystems.]"
         "[+*?Pseudo-random part to deter denial of service attacks.]"
         "[+*?Default pseudo-random part (no specific \bX...\b template) "
-            "formatted to accomodate 8.3 filesystems.]"
+            "formatted to accommodate 8.3 filesystems.]"
     "}"
 "[+?A consecutive trailing sequence of \bX\b's in \aprefix\a is replaced "
     "by the pseudo-random part. If there are no \bX\b's then the "

src/lib/libcmd/tail.c

@@ -64,7 +64,7 @@ USAGE_LICENSE
 "[h!:headers?Output filename headers.]"
 "[l:lines?Copy units of lines. This is the default.]"
 "[L:log?When a \b--forever\b file times out via \b--timeout\b, verify that "
-	"the curent file has not been renamed and replaced by another file "
+	"the current file has not been renamed and replaced by another file "
 	"of the same name (a common log file practice) before giving up on "
 	"the file.]"
 "[q:quiet?Don't output filename headers. For GNU compatibility.]"
@@ -86,7 +86,7 @@ USAGE_LICENSE
 		"[+y?years]"
 		"[+S?scores]"
 	"}"
-"[v:verbose?Always ouput filename headers.]"
+"[v:verbose?Always output filename headers.]"
 
 "\n"
 "\n[file ...]\n"

src/lib/libcmd/uname.c

@@ -35,7 +35,7 @@ USAGE_LICENSE
 "	standard output. When options are specified, one or more"
 "	system characteristics are written to standard output, space"
 "	separated, on a single line. When more than one option is specified"
-"	the output is in the order specfied by the \b-A\b option below."
+"	the output is in the order specified by the \b-A\b option below."
 "	Unsupported option values are listed as \a[option]]\a. If any unknown"
 "	options are specified then the local \b/usr/bin/uname\b is called.]"
 "[+?If any \aname\a operands are specified then the \bsysinfo\b(2) values"